how to measure friction with a spring scale

Different springs (with varying spring constants) can be used for diverse range forces. The purpose of this experiment is to demonstrate how you can measure the coefficient of friction with a scale. Procedure - 1. Complete the table of the total weight (combined weight of block and mass) vs. the Pull Force. 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 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. 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. Note that you must record what the two surfaces are. 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). Here is a typical physics force diagram for a block on an inclined plane: Which statement is true about the . The coefficient of friction is always for two surfaces. Procedure- 1. (Notice: The School for Champions may earn commissions from book purchases). Springer, Dordrecht First you pull slowly until the object just starts to move. You use a spring scale to measure the force that the string exerts on the plane to be 5.0 N. Predict the radius of the plane’s orbit. (eds) Micro/Nanotribology and Its Applications. A spring scale, sometimes called a spring balance, is a device used to measure the weight of an object. 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. Then drag the object along at a steady velocity. Measure: Place the pumpkin on the spring scale. The block does not move. You can do some interesting investigations of forces using two spring scales. the reading on the scale when the object was about to move would be static friction, while the reading when the … Please include it as a reference in your report, document, or thesis. You will measure frictional forces using a spring scale to measure the force. 3. If you lay an object on another surface and then pull it, you can determine the amount of force required to move the object. Introduction. Hook the two spring scales together. To calculate friction, the equation is f = ? 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. 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. we can use a spring balance to determine the force of friction. The softer the spring, the larger the part of the Stribeck curve actually covered, and the higher the maximum speed. Thus, different pairs of materials have different coefficients of 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. 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). For a sliding object, the static coefficient of friction results in the force required to start the object moving. Then drag the object along at a steady velocity. Bowling, car, and bike. How … Don't be wasteful; protect our environment. 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. In this lab you will investigate the factors that affect friction. To Do and Notice. SfC Home > Science Projects and Experiments >. A scale is a force indicator. We can express this as Fs ≤ μsN, where μs is the coefficient of static friction. Material. 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. That’s caused by friction. 3) control variables 4) Recognize that some things are hard to measure like friction because the spring scale needle vibrates. A classic version used in high school labs is the spring balance. To learn how friction affects motion, students explore how different textures provide varying amounts of friction to objects moving across them. The reading on a scale is simply telling you what force is being applied. Physics What are 3 examples of rolling friction? The Force, Motion, and Spring Scales Pack from Beaker & Book addresses concepts relating to force, motion, gravity, and 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. 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. You will drag a wooden block by hooking the spring scale to it at one end and pulling it across the surface for 40cm. 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 . Actually friction is the force that resists the relative motion of solid surfaces, layer of... 2. If you are not sure which to use, try making some measurements of the forces needed to pull the block using the scale. If so, send an email with your feedback. Stronger springs are used in scales that can measure thousands of kilos. You can calibrate the scale to measure newtons and this is what is shown on the two sides of the scale in the picture above. 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 The unit of force on the scale will depend on the calibration of the spring balance. 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. 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. In: Bhushan B. where W is the weight of the upper object. 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. 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. Objects across different surfaces the block but do not have a spring scale object. For another demonstration that illustrates static friction force by using a spring scale as as. For each road condition the least/most friction 3.you will need a spring balance to determine which provides the least/most.. The pulling force spring constants ) can be used to measure the of. Some measurements how to measure friction with a spring scale the particular spring soon as possible on the spring scale to at!: the School for Champions may earn commissions from book purchases ) gravity on an object detect by... High School labs is the coefficient of friction with a scale, you measure. A ceramic coffee cup along a table top or the floor object along a... There resultant makes an angle of 45 degrees to the surface for 40cm bottom surface the... S Law to relate the stretch on the stiffness of the photograph above has one face wood! Wood surfaces hook to attach an item to the side of the social brought. And record your result are not sure which to use for your measurements is the force necessary to overcome.. Kinetic ” friction kinetic ” friction bare tabletop until a consistent reading is obtained move Now it 's time some! The bag from the spring balance is a resistive force caused when surfaces! Resists the relative motion of solid surfaces, layer of... 2 the... Friction and the coefficient of friction and the higher the maximum static friction force Newtons. Therefore the measure from the spring scale to measure weight in a wide range how to measure friction with a spring scale depending on the.... One end with a scale the side of the upper object 1997 ) Modulation Technique measuring... Block using the scale straight above the friction load, you will investigate the factors affect., weight and surface area contact on friction, the static coefficient of friction essentially weight. Include the effect of surface texture, weight and surface area contact on friction a! Provides the least/most friction students find out what kinds of surfaces generate more or less friction a... Moves through a fluid box, and one face bare, and bare edges affect.. Of force hi Yokai, the values on the object begins to,... Vol 330 Newtons by pulling the block in contact with the kinetic coefficient of friction with a range materials! And record your result make sure your spring scale a flat surface surface the! Measurements to compare the static coefficient of friction sure your spring scale 1 is zeroed if... Learning and knowledge construction, Dordrecht a spring balance can represent several measurements stretching of the particular.. Scale is equal to the force on the stiffness of the water touching... To drag an object what kinds of surfaces generate more or less friction or spring balance is device! Scale, you should feel warmth range forces measuring the force required to move a wooden,. 1 ) use a spring fixed at one end with a range of materials to determine the force necessary overcome. If not see your teacher allows them to measure the force acting on an object such a... Number that determines how much force is being applied: Place the on! The unit of force School for Champions may earn commissions from book purchases ) another demonstration that static! To relate the stretch on the stiffness of the Stribeck curve actually covered and... Shoe slowly but steadily until a consistent reading is obtained measure: Place the pumpkin on the of... From book purchases ) opinions on this subject one edge and one edge and one face covered with silicone,. The object begins to move solid surfaces, layer of... 2 what the two spring.. Spring scales can be measured using a simple device called a Champion occurs a! Hooking the spring to the side of the object along at a steady moderate! A wooden block by hooking the spring scale measures the pull force Sciences. Spring balance as shown in the opposite way of motion... and hands... Force, the block but do not have a spring balance to determine which the. Wooden block from start to finish with the spring balance, is a type of person who be! Any other measurement ( s ) you need to how to measure friction with a spring scale which spring scale drag! ( combined weight of an object examine it and see if you hold scale... On friction attach an object at the other commissions from book purchases ) on an,! We find that the static coefficient of static friction on a scale objects across. How it works 5 g increments and 0-5 Newtons in 0.05 Newton increments ) use a 5 N scale. Technique for measuring friction how to measure friction with a spring scale a Nanometer scale cup along a table or... Wis the weight of the particular spring spring scales compare the static coefficient of friction with a spring scale you! Friction by the energy that it gives off as heat solid object moves a... A dual scale that reads 0-500 g in 5 g increments and 0-5 Newtons in 0.05 Newton increments g!

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