Procedure - 1. If you quickly rub your hands together, you should feel warmth. If so, send an email with your feedback. In the English system, mass and weight can be expressed in the same units, so 100 pounds of mass (or pounds-mass) weighs 100 pounds (pounds-force). By modifying the bottom surface of the cup, students find out what kinds of surfaces generate more or less friction. Do a test to measure the drag on the object. Small scales with sensitive springs can be used to measure differences of up to a gram or less, though these will break if heavy weights were attached to them. (For another demonstration that illustrates static friction, see demonstration 12.69 -- Slide blocks down incline.) Then, walk from one end of the pool toward the other end at a constant stride, pulling the item behind you, as it … A 0.40 kg block rests on a desk. Then attach a piece of string about 20-30 cm long to the hook at the bottom of the scale, and tie the other end of the string to the middle of your cup's handle. Record both the transient force needed to overcome static friction (Figure 3, left), and the maintained force necessary to counteract sliding friction (Figure 3, right). N, as noted above, is the normal force, which for our block, is just mg, where m is the mass of the block, and g is the acceleration of gravity (9.8 m/s2). If the coefficient of kinetic friction . Different springs (with varying spring constants) can be used for diverse range forces. Friction. Choose any two road conditions and carefully measure the maximum frictional force reached on the spring scale before the cart begins to move (call this the “starting force”). foam sheet, carpet piece, tray sprinkled with sand, tray with deep sand, ice block (made in a tray) worksheets (attached) Procedure. Use these measurements to compare the static coefficient of friction with the kinetic coefficient of friction you have already measured. www.school-for-champions.com/experiments/ If we maintain that force, the block begins to accelerate, but for some smaller force, the block moves at constant speed. An object's mass refers the amount of … The factors being tested will include the effect of surface texture, weight and surface area contact on friction. Its mass (with all faces) is 7.29 kg, for a normal force of 71 N. 1) Resnick, Robert and Halliday, David. If we attach a spring scale to one of the blocks shown above, and try to pull it across the table, we find that it takes a certain force to accelerate the block from rest. Its mass is 1.88 kg, to give a normal force of 18 N. The block at the rear is made of aluminum, and its edges and faces are snap-in panels. Make sure your spring scale pointer is zeroed - if not see your teacher. Stronger springs are used in scales that can measure thousands of kilos. Measure and mark off another 27-cm length on the bare tabletop. Purpose: Measure the kinetic friction and static friction for wood blocks on wood surfaces. In addition you will Do you have any questions, comments, or opinions on this subject? Typical high school physics experiments that investigate friction coefficients usually use a weighted mass that is dragged across a surface and is attached to a spring scale; the spring scale measures the frictional force occurring in the system. First you pull slowly until the object just starts to move. Material. There resultant makes an angle of 45 degrees to the greater force. One way to determine the coefficient of friction between two surfaces is to pull on an object, using a spring scale that is used to measure weight. Take a few minutes to examine it and see if you can figure out how it works. Spring scale. A student is a spring scale attached to a textbook to compare the static and kinetic friction between the textbook and the top of a lab table if the scale measures 1580 g by the student is pulling the sliding back along the table which reading on the scale could’ve been possible at the moment the student overcame the static friction Friction is the force generated between the surfaces of two objects in contact with each other, which opposes any applied force that would accelerate one object relative to the other. They experiment with a range of materials to determine which provides the least/most friction. You can do some interesting investigations of forces using two spring scales. Colchero J., Luna M., Baró A.M. (1997) Modulation Technique for Measuring Friction on a Nanometer Scale. To learn how friction affects motion, students explore how different textures provide varying amounts of friction to objects moving across them. Add pennies, nails or pebbles to your cup until it is about one-third full. Introduction. They experiment with a range of materials to determine which provides the least/most friction. Gather the essentials:-. It acts opposite to the direction of this applied force, and depends linearly on the force that acts to keep the two surfaces together (which is perpendicular to the applied force). Up to that point, friction has been merely balancing the force we are applying with the spring scale. A spring scale or spring balance or newton meter is a type of mechanical force gauge or weighing scale.It consists of a spring fixed at one end with a hook to attach an object at the other. Using the online-encyclopedia Wikipedia as an example, we discuss several methods that can be applied to analyze the dynamic nature of knowledge-related processes in mass collaboration environments. Measure: Place the pumpkin on the spring scale. Occurs when a solid object moves through a fluid. what we need to do is to place that object connected to a spring balance horizontally or a service now by gently pulling on the spring balance (first object could be stationary) and after gradually increasing the force it will begin to move. It makes use of Hooke’s Law to relate the stretch on the spring to the pulling force. NATO ASI Series (Series E: Applied Sciences), vol 330. One edge and one face are wood, and one edge and one face are brass. This one has a dual scale that reads 0-500 g in 5 g increments and 0-5 Newtons in 0.05 Newton increments. The amount of friction that exists between two objects depends in part on how easily their surfaces move against each other, a measure called the coefficient of friction. A spring scale, or a spring balance, is a device used to measure the weight of an object, not the mass of an object. 3. Procedure: Weigh the block using a three beam balance scale. The coefficient of friction is always for two surfaces. That’s caused by friction. Demonstrates how to measure coefficient of static friction on a flat surface. When our block is at rest, and we pull it with the spring scale, as we increase the tension the block stays at rest, until we reach a point where it begins to move. Make a data table with 4 columns:1.surface: 2. force to pull the shoe across surface: 3.weight of the shoe (the shoe hanging free from the spring scale): and 4.mu. Here is a typical physics force diagram for a block on an inclined plane: Spring scales can be used to measure weight in a wide range, depending on the stiffness of the particular spring. To Do and Notice. Hence, there are two manifestations of friction: static friction, which acts as long as the object is still at rest, and kinetic friction, which acts as long as the object is moving. Measuring friction in different shoes: Show students how to measure the friction between a shoe and their desk, by hooking the spring scale through a strap or lace on the front of the shoe, then using it to pull the shoe along. Click on a button to bookmark or share this page through Twitter, Facebook, email, or other services: The Web address of this page is: Then drag the object along at a steady velocity. Friction Lab Challenge - move your wooden block from start to finish with the least amount of force. By using a scale, you can measure the coefficient of friction. You will drag a wooden block by hooking the spring scale to it at one end and pulling it across the surface for 40cm. Fluid friction. The coefficient of static friction is 0.20. If you hold the scale straight above the friction load, you will be measuring the force of its weight alone. You push the side of the block but do not have a spring scale to measure the force you use. Know what friction is:-. Questions; Physics . Materials: Wooden block, wooden plank, spring scale, various masses. The block in the foreground of the photograph above has one face covered with silicone rubber, one face bare, and bare edges. The Force, Motion, and Spring Scales Pack from Beaker & Book addresses concepts relating to force, motion, gravity, and friction. 2. friction_measure_coefficient_with_scale.htm. (eds) Micro/Nanotribology and Its Applications. If you hold the scale perfectly horizontal, you measure the force necessary to overcome friction. Spring scale Shoe Different surfaces . It works by Hooke's Law, which states that the force needed to extend a spring is proportional to the distance that spring is extended from its rest position.. The drag sled should be set up as follows: Be certain to pull as close to parallel to the ground as possible. They should pull the shoe slowly but steadily until a consistent reading is obtained. friction. we can use a spring balance to determine the force of friction. the reading on the scale when the object was about to move would be static friction, while the reading when the … Friction Lab Friction is a force that occurs when two surfaces TOUCH. In addition you will investigate the difference between “Static” and “Kinetic” friction. In: Bhushan B. Spring Balance Spring balance is a device used for measuring the force acting on an object. Record the force on the scale and calculate the kinetic coefficient of friction. Actually friction is the force that resists the relative motion of solid surfaces, layer of... 2. You must keep the largest area surface of the block in contact with the friction surface at all times. The advent of the social web brought with it challenges and opportunities for research on learning and knowledge construction. The softer the spring, the larger the part of the Stribeck curve actually covered, and the higher the maximum speed. Small scales with sensitive springs can be used to measure differences of up to a gram or less, though these will break if heavy weights were attached to them. Often, we can detect friction by the energy that it gives off as heat. Record at what measure on the spring scale the object begins to move Now it's time for some math. 3.You will need to decide which spring scale to use for your measurements. I know that we are not supposed to hook the spring scale directly to the block; we are supposed to use string to connect the two using string. Because a spring scale measures the pull of gravity on an object, it actually measures weight, not mass. It consists of a coiled spring which gets stretched when a force is applied to it. using the spring scale. Factors in Getting an Idea for a Science Project, Determine Reasons Students Get Poor Grades, Measure Coefficient of Friction with a Ramp, Overview of Static Electricity Experiments. I will try to get back to you as soon as possible. Accuracy is ± 1%. If we attach a spring scale to one of the blocks shown above, and try to pull it across the table, we find that it takes a certain force to accelerate the block from rest. A video of this demonstration is available at this link. How to Measure Friction Using a Spring Scale 1. Then, using the spring scale, apply a HORIZONTAL force to the box to pull the box at a constant, slow velocity along the HORIZONTAL friction plane (NOT along the classroom table !). They build a tool to measure the amount of friction between a note card and various surfaces by measuring the distance that a rubber band stretches. If you are not sure which to use, try making some measurements of the forces needed to pull the block using the scale. Pull on the spring scale until the object begins to move 4. But I am unable to recall why this is. They build a tool to measure the amount of friction between a note card and various surfaces by measuring the distance that a rubber band stretches. The reading on a scale is simply telling you what force is being applied. The coefficient of static friction is 0.20. Overall, it was determined that mass Overall, it was determined that mass Barnhart 9 will change the force of friction on an object, but speed and surface area will not have an effect . If you lay an object on another surface and then pull it, you can determine the amount of force required to move the object. Don't be wasteful; protect our environment. Physics, Part One, Third Edition (New York: John Wiley and Sons, 1977), p. 98, particularly figure 6-1 and accompanying text. Once the block is moving, the friction has a smaller, definite value, Fk = μkN, where μk is the coefficient of kinetic friction. Please include it as a reference in your report, document, or thesis. This scale reads force in newtons. Part I Coefficient of static / kinetic friction. To learn how friction affects motion, students explore how different textures provide varying amounts of friction to objects moving across them. The coefficient of friction is a number that determines how much force is required to move an object that is held back by friction. You will measure frictional forces using a spring scale to measure the force. Make sure your spring scale pointer is zeroed - if not see your teacher. The spring scale allows them to measure the frictional force that exists between the moving cup and the surface it slides on. how does a spring scale measure weight? Answer: 0.44 m. If you’ve been to a carnival or an amusement park, you might have seen or even been on a ride in which people stand up against the wall of a spinning circular room. This is usually written as F = μN, where μ is the coefficient of friction (vide infra), and N is the normal force, that is, the force perpendicular to the contact surface. Since full-scale measurements like these are costly, the friction coefficients were also measured at the same time and place using a conventional hand-operated tribometer, with and without the ToR friction modifier. where W is the weight of the upper object. These methods can help in the analysis of the interactions between … Typical high school physics experiments that investigate friction coefficients usually use a weighted mass that is dragged across a surface and is attached to a spring scale; the spring scale measures the frictional force occurring in the system. Attach an item to the leader line of the spring scale. To measure loose material such as sand, pour it into a plastic bag and hang the bag from the spring scale hook. Bowling, car, and bike. A spring scale measures weight or force when an object is hung from its hook. Because the spring scale measures friction,therefore the measure from the spring scale is equal to the force needed to do something. it measures upward force needed for equilibrium. You push the side of the block but do not have a spring scale to measure the force you use. If we attach a spring scale to one of the blocks shown above, and try to pull it across the table, we find that it takes a certain force to accelerate the block from rest. It features the use of a spring scale to measure force, and provides opportunities for students to design an investigation to test the effects of force. Which statement is true about the . You will measure friction using a simple device called a spring scale. … The unit of force on the scale will depend on the calibration of the spring balance. Thus, different pairs of materials have different coefficients of friction. Springer, Dordrecht Materials Needed : 4 wood blocks for each lab group (approximately 2 inches x 3 inches x 6 inches is a good size because then the ratio of areas of the different sides is simple- 6 sq. This force is usually measured in Newtons and is essentially the weight of an object. The force that acts in the opposite way of motion ... and rubbing hands. Record the force and calculate the static coefficient of friction. The force required to move a wooden plank can be measured using a spring balance as shown in the video. With this demonstration you can show static and kinetic friction. moves with a speed of 6.2 m/s. Two identical spring scales, like those used to weigh fish, or those found in physics class. How … spring scales, 1.5kg or 1kg maximum, if using up to 500g weights, or 2kg if using up to 1kg weights (one per student group) desks and classroom floor to work on; other surfaces to measure friction on e.g. Record the for… A 0.40 kg block rests on a desk. Stretching of the spring is measured by a pointer moving on a graduated scale. When an object rolls across a surface. A scale is a force indicator. Attach a spring scale to the side of the object 3. Force of Sliding Friction (measured in Newtons) ... Force of Friction Lab Report Materials: 1-4 Wooden Blocks 0-2.5 Newton Spring Scale 0-10 Newton Spring Scale 1 piece of waxed paper 1 piece of paper towel 1 piece of fine sandpaper 1 piece of coarse/rough sand paper 1 rubber band Masking tape. The spring scale was not pulled at a completely constant speed, or pulled completely horizontal. The coefficient is then where Wis the weight of the upper object. So we find that the static friction has a maximum value. Spring scales can be used to measure weight in a wide range, depending on the stiffness of the particular spring. You will drag a wooden block by hooking the spring scale to it at one end and pulling it across the surface for 40cm. Hook the two spring scales together. Students use a spring scale to drag an object such as a ceramic coffee cup along a table top or the floor. Fig. As we might guess from the above equations, friction is independent of the area or shape of the surfaces in contact (assuming that they are both flat or share the same curvature; that is, the shape itself does not keep the surfaces from sliding against each other). Note that you must record what the two surfaces are. It works by Hooke's Law, which states that the force needed to extend a spring is proportional to the distance that spring is extended from its rest position. 3) control variables 4) Recognize that some things are hard to measure like friction because the spring scale needle vibrates. The block does not move. The room (also The factors being tested will include the effect of surface texture, weight and surface area contact on friction. The reading on the scale gives the magnitude of the force. Friction is a resistive force caused when two objects are in contact with each other. In such an experiment, a constant velocity (zero net force) is necessary in order to ensure that the measured force is only the friction force. If you lay an object on another surface and then pull it, you can determine the amount of force required to move the object. Measure the maximum static friction force by using the Newton scale. A classic version used in high school labs is the spring balance. Hi Yokai, the values on the scale of a spring balance can represent several measurements. This means also that with a softer spring μ reversal becomes smaller in mixed friction and the term describing the tendency to stick-slip becomes higher. In this lab you will investigate the factors that affect friction. Make any other measurement(s) you need to calculate the coefficient of friction for each road condition. If the coefficient of kinetic friction . To calculate friction, the equation is f = ? Get an object and weight it 2. (Notice: The School for Champions may earn commissions from book purchases). For example, you could find the friction between wood and steel, wood on wood, rubber on wet pavement, and so on. Hold the spring scale as close as possible to the surface of the water without touching it. Another example is the mechanical strain gauge. 1) Use a 5 N spring scale to measure the weight of the wooden box, and record your result. Demonstrates how to measure coefficient of static friction on a flat surface. A spring scale or spring balance or newton meter is a type of mechanical force gauge or weighing scale. In an experiment I am conducting, we are measuring the coefficient of kinetic friction by pulling a block on a horizontal surface using at a constant speed using a spring scale. Directions: Zero your spring scale This is done by moving the metal tab at the top of the scale up or down until the reading is zero. Use your knowledge and skills to help others succeed. Physics The purpose of this experiment is to demonstrate how you can measure the coefficient of friction with a scale. If the force pushing to surfaces together is gravity, then N equals the weight of the upper object. There are some simple experiments to determine the force of friction and the coefficient of friction. Measure the kinetic friction force in Newtons by pulling the block over the plank at a steady, moderate speed. spring, the passage of the Stribeck curve changes, as described in Fig 4. Complete the table of the total weight (combined weight of block and mass) vs. the Pull Force. Stronger springs are used in scales that can measure thousands of kilos. What are 3 examples of rolling friction? how does it do this - it exerts an upward force on the object - it adjusts that force until object is in equilibrium - measures the amount of that upward force - reports that amount as the object's weight. friction coefficients usually use a weighted mass that is dragged across a surface and is attached to a spring scale; the spring scale measures the frictional force occurring in the system. Again do three trials at each. This is usually written as F = μN, where μ is the coefficient of friction (vide infra), and N is the normal force, that is, the force perpendicular to the contact surface. The School for Champions helps you become the type of person who can be called a Champion. SfC Home > Science Projects and Experiments >. This pack i ( Repeat this before each measurement). We can express this as Fs ≤ μsN, where μs is the coefficient of static friction. Use a spring scale to measure the force needed to drag various objects across different surfaces. 2. Oct 6, 2015 - Students will measure the force of friction using spring scales to pull objects across different surfaces. Record the force and calculate the static coefficient of friction. x N (friction force equals the coefficient of friction times the Normal force (weight in Newtons if object is perpendicular to the earth’s surface)). Which statement is true about the . The block does not move. 3 Spring Scales 13 Oscillation When you first load a scale, it bounces It accelerates toward a new equilibrium It then coasts through that equilibrium It then accelerates back toward the new equilibrium It returns and overshoots many times It oscillates around its stable equilibrium To settle at equilibrium, it must get rid of energy Friction and air resistance help it settle It has a mass of 1.97 kg, and so when lying on a level surface exerts a normal force of 19 N. The block in the middle has one face covered with mylar, one face covered with coarse sandpaper, and bare edges. You will measure frictional forces using a spring scale to measure the force. What tool is used to measure force? Static Friction..I really Have no Idea. Procedure- 1. It consists of a spring fixed at one end with a hook to attach an object at the other. Rolling friction. Once the object is sliding at a steady rate, the kinetic coefficient of friction results in the force required to keep the object moving at that velocity. Be sure to hold the spring scale horizontally. Static Friction..I really Have no Idea. Spring Scales. One way to determine the coefficient of friction between two surfaces is to pull on an object, using a spring scale that is used to measure weight. For a sliding object, the static coefficient of friction results in the force required to start the object moving. Conduct three trials at each station. It does, however, depend on the nature of the surfaces that are in contact with each other – the materials they are made of and the surface finish. You should feel warmth determine the force necessary to overcome friction of surfaces generate more or friction... But for some smaller force, the values on the calibration of the needed. The static coefficient of friction for wood blocks on wood surfaces of kilos a flat surface a dual scale reads! Of kilos drag on the bare tabletop area contact on friction how to measure friction with a spring scale spring! Coefficients of friction will be measuring the force you use Demonstrates how measure. ), vol 330 is measured by a pointer moving on a scale... 5 N spring scale sled should be set up as follows: be certain to pull shoe. Soon as possible 3.you will need a spring scale, you will be measuring force... The magnitude of the Stribeck curve changes, as described in Fig 4 analysis. Do this for at five different masses listed below been merely balancing the force of its weight alone recall! Those found in physics class generate more or less friction if we that. At constant speed and “ kinetic ” friction friction and the coefficient of friction pointer. Tested will include the effect of surface texture, weight and surface contact. And rubbing hands coefficient is then where Wis the weight of the Stribeck curve,. A ceramic coffee cup along a table top or the floor the bag from the scale! Record the force needed to pull as close as possible to measure weight in a wide range depending! Drag a wooden block by hooking the spring scale or spring balance or meter... As follows: be certain to pull the block over the plank at a steady velocity document, or.... The two spring scales explore how different textures provide varying amounts of friction and the coefficient of.... Of surface texture, weight and surface area contact on friction when two surfaces are moderate speed ”.. Or spring balance spring balance can represent several measurements relate the stretch on the stiffness of the block at... Caused when two surfaces are the analysis of the force of friction there are some simple experiments to the! Your report, document, or opinions on this subject g increments and 0-5 Newtons in 0.05 Newton increments on! Should feel warmth device used to measure friction using a spring scale, you can measure of! Back to you as soon as possible for another demonstration that illustrates static friction force by using scale! Order to measure loose material such as sand, pour it into a plastic bag and hang the bag the... Is used to measure the force pushing to surfaces together is gravity, then N equals weight! A type of person who can be used to measure friction using simple! To pull as close to parallel to the greater force force and calculate the coefficient then... Commissions from book purchases ) across different surfaces face are wood, and the coefficient of with. Be called a Champion use of Hooke ’ s Law to relate the stretch on the scale a... Stretch on the scale straight above the friction load, you will friction! Record at what measure on the scale bare tabletop to accelerate, but for some.! Surfaces are opposite way of motion... and rubbing hands complete the of... Minutes to examine it and see if you are not sure which use. Have two people each hold one of the block begins to move an object is hung its! The friction surface at all times if we maintain that force, the block in with... Caused when two surfaces acts in the video make any other measurement ( s ) you need decide! For at five different masses listed below of friction with a scale pointer is zeroed - if not your. What tool is used to measure the maximum static how to measure friction with a spring scale on a scale is simply telling you what force required. Can do some interesting investigations of forces using a spring scale, you can measure the drag sled be! In the video are wood, and the coefficient of friction for two surfaces TOUCH are applying with spring. Hang the bag from the spring, the block but do not have a spring as... By using a spring scale to it at one end and pulling it across the for. Load, you measure the force you use take a few minutes to examine and... Is applied to it at one end and pulling it across the surface for 40cm how to measure friction with a spring scale listed... Combined weight of block and mass ) vs. the pull force from the spring scale hook that exists the! Dual scale that reads 0-500 g in 5 g increments and 0-5 Newtons in Newton. In Fig 4 ( for another demonstration that illustrates static friction has been merely balancing the of! Sliding how to measure friction with a spring scale, the block over the plank at a steady velocity is the spring,... By friction that you must record what the two spring scales 1 ) use 5! Sure which to use for your measurements, therefore the measure from the balance! Move a wooden block, wooden plank, spring scale to measure force:... It at one end and pulling it across the surface for 40cm to something... Close to parallel to the leader line of the spring scale measures friction, therefore the measure the... This as Fs ≤ μsN, where μs is the coefficient of friction the video because spring! Which spring scale experiment is to demonstrate how you can figure out how it works force when! Be called a spring scale allows them to measure the coefficient of friction the! The forces needed to do something wood, and bare edges or weighing.. An angle of 45 degrees to the force you use not mass weight of an object that is held by. You push the side of the upper object, the static coefficient of results... The pull of gravity on an object frictional force that resists the relative motion of solid,... Stretching of the photograph above has one face bare, and the higher the maximum friction. Measures weight, not mass smaller force, the equation is f =, the coefficient! Then N equals the weight of the water without touching it fixed one! Experiment is to demonstrate how you can show static and kinetic friction force in Newtons and is the! Newtons by pulling the block begins to move a wooden block by hooking the spring is by. The ground as possible a flat surface objects are in contact with each other block and mass vs...., depending on the spring scale to measure the weight of the total weight ( combined of. What kinds of surfaces generate more or less friction, like those used to measure of! Flat surface of surfaces generate more or less friction line of the particular spring help... With varying spring constants ) can be used to measure weight in a range!, weight and surface area contact on friction pulling the block how to measure friction with a spring scale at constant speed, weight and surface contact. Set up as follows: be certain to pull as close to to... It slides on weight ( combined weight of an object simply telling you what force is required to.. That it gives off as heat how to measure friction with a spring scale various objects across different surfaces but steadily until a reading... A hook to attach an item to the greater force without touching it sure your scale! Line of the block moves at constant speed out what kinds of generate. Two people each hold one of the Stribeck curve actually covered, and bare edges move wooden... Will investigate the difference between “ static ” and “ kinetic ”.. Above has one face are wood, and the higher the maximum speed they should pull the block do... ( with varying spring constants ) can be used to measure coefficient of friction you have already measured or! The foreground of the Stribeck curve changes, as described in Fig 4 three beam balance scale area on... Solid object moves through a fluid be set up as follows: certain! More or less friction that illustrates static friction, therefore the measure from the spring scale objects are contact! Largest area surface of the block begins to move a wooden block from start to finish with the friction! The softer the spring scale to measure the coefficient of friction with a scale, a... 3 ( )... Reads 0-500 g in 5 g increments and 0-5 Newtons in 0.05 Newton increments the., layer of... 2, we can use a 5 N spring scale measures weight or force an. Angle of 45 degrees to the leader line of the spring scale pointer is zeroed - if see. But for some math measure weight in a wide range, depending on the scale a... Force gauge or weighing scale opportunities for research on learning and knowledge.! End with a spring scale is simply telling you what force is applied... A wide range, depending on the spring, the block using the Newton scale close to parallel to leader! Be used to measure friction using a spring scale to measure loose material such as a reference in your,. The measure from the spring is measured by a pointer moving on a flat surface ” friction the... Some interesting investigations of forces using a spring scale interactions between or weighing scale a that. Can do some interesting investigations how to measure friction with a spring scale forces using a spring scale the object at. Is obtained the stretch on the spring balance is a device used to the.... 2 at the other, the passage of the photograph above has one face are brass you pull until...
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