What will happen if he connects 100 LEDs, all in a parallel combination, to A ramp wemade this one using a sheet of plywood, gaffer tape and some carpet. 0000038645 00000 n Calculate the force of friction using the formula: F = n. Would the ball's motion continue forever along the tangent, or forever parallel to the Earth's surface? Finally, do you know why a balloon makes a funny noise when you let it go? Investigate which material would make the best ice hockey puck. B. Coefficients of friction for various materials Coefficients (both and ): plastic plate < wooden plank < brick. Friction Lab Report. Notice that these are not vector equations. In procedure 1, it was attempted to find the relationship . The net force in the y-direction (vertical) is zero. You could investigate the force needed to break an eggshell. Teaching Guidance for 14-16. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Get new experiments straight into your inbox every week!! between the force of friction and the normal force of a slide block. Slowly push the wooden plank (together with the trolley underneath) away from the spring balance. You will apply a horizontal force to a block of wood loaded with weights in order to pull the block at constant velocity across a horizontal plane. Air resistance and friction take time to slow an object down, if you want an object to stop quickly you need to apply further force, for example a brake on a bike. Secondary, due to the fact that we have a y-intercept which means that there A lighter object needs less force to move than a heavier object. A unit-less ration between normal and frictional force that differs among objects. Your hands probably got warmer, right? Procedure A. Y- You can specify conditions of storing and accessing cookies in your browser, 13) Calculate the K.E, P.E, total energy and binding energy of an artificial satellite of mass 2000 kg orbiting at a height of 3600 km above the surfa x]obUQ(@ &Eg !r8N8&vi"+vZo?o2lw E?It4fr}w7|v S,SkN7?.ufvz)Jkwny rJ*rXq;EY0uw:Uy\qFm026-#qy?YfVEkQem~%4tMzZJYahEu)49S5@#r@3>3o=]6-"xG1^$L7yGib i;v'n4O]g&0~`5YeKX#/1)Nct`]O3=MuemOxB 0000036774 00000 n Friction is surprisingly complicated. The coefficient is assigned to a pair of materials not just one material. Weve got friction experiments, gravity experiments, air resistance experiments and lots more! More and more ways have been developed to study the physical and chemical process involved in friction. Store up energy in an elastic band to make a cotton reel car move. 59 5. If gravity is very strong it becomes harder to slide a body on a surface because of increased force of friction. 18 The reaction force exerted on the braking pads and the coefficient of kinetic friction should be maximized. 0000001842 00000 n Being sure not to damage the textbook, slide the textbook along various surfaces, keeping a keen eye on the frictional force that each surface has on the movement of the textbooks. You will submit your completed report. There are two types of friction: static friction and kinetic friction. A CD Hovercraft is great fun to make and test too. Again, the model says it doesn't - still a good thing to look at. Step 4. 5. The ability for a 49ers player to stop immediately on grass turf with cleats would be an example of good friction. Use a little whipping motion at the end of the rubbing. By continuing well assume youre on board with our cookie policy, Dont waste Your Time Searching For a Sample, The Friction and Collision Between Trade Sanctions and Free Trade as Effects of Economic Globalization, Circular Motion Physical Experiment Report, Experiment Determine Vitamin C in Pineapple Juice, ASK writer for << /S /GoTo /D [2 0 R /Fit] >> Wow! Here's how: Put the lid on the bottle and tap the bottom of the bottle on a hard surface. This maximum value is the limiting static friction. Hence the total error in measuring the force is . H|Wn7W8c`(A 9$^ #aX,wcY|tuuueL[22. 0000004433 00000 n 59 5. The block and the plank slide horizontally. Forces can make object moves or stop, speed them up or slow them down. Name and Title Name of Lab: Student Name: Instructor: Date: Objective C. Effect of surface area on friction Theoretically, friction is independent of contacting area. . All rights reserved. Galileo thought that a ball, rolling or sliding down a hill without friction, would run up to the same height on an opposite hill. X "Friction opposes motion". Friction between two surfaces arises from interaction between molecules on the surfaces. Did I not write a basics post on uncertainty? Martial arts moves can seem magical, but maybe they just display a mastery of physics. I have used a piece of paper to put rice in plastic bottle until it is about to full. If you push a toy car it moves, if you push it harder it moves faster. Does the extra force make a difference? 18 In the design of the braking system in bicycles, what parameter(s) should be maximized to achieve a larger frictional force? Thus mechanical energy is not conserved. In this lab, students compare the force necessary to move the same object over various surfaces. The use of oil in a cart engine, the use of right lubrication in skating as well as in basketball, the screeching sound of a sudden . Use of this site constitutes acceptance of our User Agreement and Privacy Policy and Cookie Statement and Your California Privacy Rights. Theoretically, should be only slightly smaller than. % After figuring out the math This explanation from the Khan Academy is terrific so I will borrow it: "The force of static friction is a force between two surfaces that prevents those surfaces from sliding or slipping across each other. The coefficients will never be bigger than 1 and the coefficient Measure and record how far it travels. When the applied force exceeds the limiting static friction , the body will start to slip over the rough surface. Surfaces producing greater friction require more force to move the . Material availability: Also, experimental value of is much smaller than . Or very simply, try some slipping and sliding, but be careful! 2021-22, BI THO LUN LUT LAO NG LN TH NHT 1, Cecilia Guzman - Identifying Nutrients Gizmo Lab, Chapter 2 - Summary Give Me Liberty! Types of Forces Lab Report Instructions: In the Types of Forces lab, you will experiment with the contact force friction. Record the findings in tables similar to Data Table 3. Email me @ [emailprotected], -such good ideas on forces.I so have to try one.I like the one with the ballon and car. All the Settings You Should Change on Your New Samsung Phone, Fat, Sugar, Salt Youve Been Thinking About Food All Wrong, You Can Turn Your Backyard Into a Biodiversity Hotspot, No, the James Webb Space Telescope Hasnt Broken Cosmology, The Secret to Bruce Lees Superhuman One-Inch Punch. Take rice about 1 kg. Find three different surfaces to slide (or push) the textbooks on (examples: table, carpet, tile floor, etc.). Friction is a force that resists a relative motion between two or more objects, like a rubber tire and asphalt have a coefficient . It demonstrated that friction is directly proportional to normal reaction but independent of contacting area. Now I will add the math model for the block moving on the mini rug. Drop water balloons filled with paint and compare splatter patterns from different heights. The total friction force Ft is the sum of the dry friction FD, the boundary friction FB, and the fluid friction FL. Place the wooden blocks onto the wooden plank side by side instead of piling up. Acceleration. Your email address will not be published. I thought that the Last Updated on May 4, 2021 by Emma Vanstone. And the value of is roughly proportional to the normal reaction R. where is the coefficient of static friction at the contact surface. I thought I did. Physics lab #7 # Back to the cabinet ( ). If you push a toy car it moves, if you push it harder it moves faster. 4Normal reaction R / N 3. But maybe that would be boring. Note the readings. Record the weight of each of the books before experimenting. Force of Friction = .41 * Force Normal + 1. Basically, whenever the normal force of the brick increases, the frictional force also increases. The coefficient (mu) is just a parameter that is experimentally determined and depends on the two materials interacting. The experimental results prove our assertion. The frictional force increased to 40.0 Newtons, a difference of 24.4 Newtons compared to the very first trial that we did. To experience friction firsthand, put your hands together in front of you and rub your palms back and forth. Read this essay's introduction, body paragraphs and the conclusion below. Repeat the experiment 6 more times, calculating a static and kinetic friction coefficient each time. Pages 5, Ask a professional expert to help you with your text, Give us your email and we'll send you the essay you need, By clicking Send Me The Sample you agree to the terms and conditions of our service. Repeat step 2. Friction Experiment. What about kinetic friction? Complexity level: 6. that there should not be a y-intercept because if the normal force is 0N then friction must be This corresponds with our previous model experiments, in which friction between the abutments of telescopic . In this lab, my partners and I tried to find out what the relationship between the normal force and frictional force of a brick is. This was because the brick surface was too rough that it was actually not a flat surface. In this experiment we proved that friction is important in our everyday motion because without it, anybody in motion will not stop because a friction is a force that opposes motion, we defined 2 kinds of friction which is static and kinetic. 2. 0N as well, as the materials are not interacting against each other which leads to no friction. 0000011324 00000 n We used carbon dioxide released from a baking soda and vinegar reaction to power a bottle boat. Repeat Parts 1 - 3 with at least two flat surfaces around the lab such as rubber, tile, cork, etc. Also written as . 2. The elastic strings have no mass. The coefficient is assigned to a pair of materials not just one material. Also, coefficients of static and kinetic friction can be compared. Forces are all around us and affect everything we do, with that in mind weve put together a collection of ideas for learning about forces and motion with a fun forces and motion experiments for everyone from preschoolers to grown ups. Watch water rise with this cool air pressure experiment. Refer to the above explanation. Make these shooters and explore trajectory and aerodynamics. Growers fear a perfect storm for a tradition that has long bound rural communities together. perpendicular to the surface. Copyright 2022 Science Sparks - Wild Sparks Enterprises Ltd. Kinetic friction coefficients are generally less than static friction coefficients, which is the reason that it is much easier to keep a heavy object in motion than it is to start it in motion [4]. 3. Collect three of your school textbooks that are different size and weight (you can use books of various sizes that you have at home as well). Some examples of this formula being used in real would include geese sliding on ice, 3. Physics Lab 1 Mass & Density. This in turn makes the football slow to a stop and enables the football to be caught. This Lab-Grown Skin Could Revolutionize Transplants. Figure 6 Make an easy magnet maze with cardboard or even a LEGO maze. A leather-soled shoe has no traction, creating less frictional force that can stop your movement. If I use the model for friction, I can eliminate Ff. help. To read the essays introduction, body and conclusion, scroll down. The relative friction produced by these surfaces can be determined and compared. Limiting static friction Friction always opposes motion. frictional force to normal force. Physics I 100% (3) English (US) United States . We found these numbers out by using the spring scale. A unit-less ration between normal and frictional force that differs among What factors do you think affect the size of the frictional force? force exerted upon an object that is in contact with another stable object, and is always We try to avoid static friction by giving a slight push to the block so it can have kinetic friction . Build some easy magnet powered carsor a magnet powered boat. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Get new experiments straight into your inbox every week!! Compare the experimental and theoretical data. LLD`gxBuL4u9"?/jTJ0~O4h/8 va&{Ww`/m= 4x1E=f8|# 6H>&y#@3Y8 _#! Once you've added a bit more rice, stick the chopstick back into the bottle. Another fun activity is to set up a teddy zip line investigation and test different types of harness and materials for the string. This is because of the friction created between your skin and the carpet. the room. Most land vehicles rely on friction for acceleration, deceleration and changing direction. Since the force from the pull has a y-component, the normal force from the table does not need to be as large. Friction between tyres and the road stop cars from skidding, when the road surface is icy there is less friction which makes it more likely cars will skid. The math model tells us a couple of . For this purpose we have found the Normal force and sliding. We know Your email address will not be published. Answers to Worksheet Questions Q. When two surfaces rub against each other, why is there a friction force? We depend on friction to keep our feet from sliding out from under us and to keep us safe. 0000015772 00000 n When surfaces in contact move relative to each other, the friction between the two surfaces converts kinetic energy into thermal energy (that is, it converts work to heat). Actually it varies in different position on Earth. The WIRED conversation illuminates how technology is changing every aspect of our livesfrom culture to business, science to design. Friction is the force between two objects when you rub them together. Does the coefficient of friction (both kinetic and static) depend on the surface area? Cross), Forecasting, Time Series, and Regression (Richard T. O'Connell; Anne B. Koehler), Civilization and its Discontents (Sigmund Freud), Psychology (David G. Myers; C. Nathan DeWall), Educational Research: Competencies for Analysis and Applications (Gay L. R.; Mills Geoffrey E.; Airasian Peter W.), Campbell Biology (Jane B. Reece; Lisa A. Urry; Michael L. Cain; Steven A. 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Science Sparks assume no liability with regard to injuries or damage to property that may occur as a result of using the information and carrying out the practical activities contained in this resource or in any of the suggested further resources. , the 240 V mains supply? The video above is not a very good example because the block is not being pulled at a constant speed. Measure the coefficients of static and kinetic friction for a particular block and track. As an Amazon Associate I earn from qualifying purchases. PHY 211: General Physics I Lab page 1 of 6 PCC-Cascade Experiment: Static and Kinetic Friction OBJECTIVES Use a Force Sensor to measure the force of static friction. Science Sparks ( Wild Sparks Enterprises Ltd ) are not liable for the actions of activity of any person who uses the information in this resource or in any of the suggested further resources. The ratio is noted as the coefficient of friction. The coefficient of friction can also be described by dividing Force of Friction by The Normal Force. Touch the lucite rod to the top of the electroscope. 0000009833 00000 n . Repeat the experiment 6 more times, calculating a static and kinetic friction coefficient each time. The basic answer is that the stuff the two surfaces are made of (atoms) are interacting with each other. Find out how you can stand on a paper cup without it breaking. N is the normal force, sometimes it's denoted by . It speeds up and then slows down. On our final trial, we increased the normal force of the brick to 6,510 grams. The greater weight/ normal force then the greater the heaviest of force anyway. Each LED will glow but the ones closer in the circuit to the main supply will glow brighter. Since the elastic strings actually have mass. stream Show your work. Great input. Once an object is moving, the magnitude of kinetic friction fk is given by. The neoprene gloves that receivers wear provide friction on the football by the receiver gripping the ball with its sticky texture. Object Mass Weight Normal Force , Coef of Friction Friction Force to Overcome Dog 0. As for directions, the frictional force is parallel to the surface of the two . Does the coefficient depend on speed (for kinetic friction obviously). Friction always opposes motion. Indeed it would be odd so pull a block to the right and have it accelerate to the left (for a block at rest). 6. Physics I 100% (5) 4. 2021-22, BI THO LUN LUT LAO NG LN TH NHT 1, Cecilia Guzman - Identifying Nutrients Gizmo Lab, Chapter 2 - Summary Give Me Liberty! Friction is desirable and important in supplying traction to facilitate motion on land. Design and build straw rockets and launch at different angles to investigate how the flight trajectory changes. Coefficient of Friction 2022-10-27. Also, coefficients of static and kinetic friction can be compared. endobj The normal force is the force exerted between the two surfaces (which doesn't have to be the weight - just a warning). Note the angle and find the coefficient of friction. Every time we added more normal force upon the brick, we found out that the frictional force also increases. FRICTION. Ad Choices. In this lab report it was investigated that, the Kinetic and Static friction force between a steel plank and other materials i.e. You should find its easier to slide with socks as theres less friction. It was very difficult to keep the force constant. . Which surface allows a car to travel the fastest? The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of Cond Nast. Same object over various surfaces, students compare the force of a slide block friction! Pads and the conclusion below May 4, 2021 by Emma Vanstone of paper to put in. And ): plastic plate < wooden plank < brick found out that the frictional force can! Atoms ) are interacting with each other at the end of the rubbing measuring force... Physical and chemical process involved in friction about to full if gravity is very strong it becomes harder slide... 3 with at least two flat surfaces around the lab such as rubber, tile,,. Put rice in plastic bottle until it is about to full that can stop your movement air! Force upon the brick, we increased the normal force of friction and the normal force from spring! Science Sparks - Wild Sparks Enterprises Ltd touch the lucite rod to the cabinet ( ) as for,. Increased to 40.0 Newtons, a difference of 24.4 Newtons compared to the cabinet ). Top of the friction created between your skin and the conclusion below we added more normal.... Slowly push the wooden blocks onto the wooden blocks onto the wooden plank ( together with the trolley )! 0N as well, as the materials are not interacting against each other, why is there a friction Ft! Chopstick back into the bottle the mini rug other materials i.e it becomes to. Will never be bigger than 1 and the carpet immediately on grass turf with cleats would an... Use the model says it does n't - still a good thing to look at have been developed to the. < wooden plank ( together with the trolley underneath ) away from spring... But independent of contacting area measuring the force needed to break an eggshell the rubbing of 24.4 compared. Lld ` gxBuL4u9 ''? /jTJ0~O4h/8 va & { Ww ` /m= 4x1E=f8| # 6H > y. Sparks - Wild Sparks Enterprises Ltd can eliminate Ff reel car move normal force, Coef of friction for particular. That is experimentally determined and compared the best ice hockey puck cork, etc the contact surface more force. Read this essay & # x27 ; ve added a bit more,. The top of the brick to 6,510 grams as well, as materials. # @ 3Y8 _ # block and track of paper to put rice in plastic bottle until is. Magnet powered carsor a magnet powered carsor a magnet powered boat zip line investigation test... Bottle boat dry friction FD, the model for friction, the frictional force is parallel to the area! When the applied force exceeds the limiting static friction and kinetic friction fk is given by add the math for... Was investigated that, the body will start to slip over the rough.... Body paragraphs and the coefficient of friction by the normal force of friction by receiver! Smaller than 6 make an easy magnet powered carsor a magnet powered boat lab Report it was very difficult keep... Between normal and frictional force increased to 40.0 Newtons, a difference of Newtons... Be compared weight/ normal force, sometimes it & # x27 ; s denoted by a static and kinetic should... And track created between your skin and the coefficient of friction for a particular block and.... Than 1 and the coefficient is assigned to a pair of materials not just one material, why there... Greater friction require more force to move the touch the lucite rod to the first... Lego maze on uncertainty the Table does not need to be caught needed to break eggshell! Both and ): plastic plate < wooden plank ( together with the contact friction. { Ww ` /m= 4x1E=f8| # 6H > & y # @ 3Y8 _ #, whenever normal. Surfaces around the lab such as rubber, tile, cork, conclusion for friction force experiment on a because! Wooden blocks onto the wooden plank < brick above is not being pulled at a speed! Steel plank and other materials i.e make a cotton reel car move tables similar to Data Table 3 move! Object over various surfaces a leather-soled shoe has no traction, creating less frictional force increases! & # x27 ; s introduction, body paragraphs and the coefficient of friction: friction! Desirable and important in supplying traction to facilitate motion on land to slide with socks as less. Materials for the block moving on the braking pads and the fluid friction FL _ # released a. The body will start to slip over the rough surface 1 - 3 with at least two flat around! Essays introduction, body paragraphs and the value of is much smaller than it does n't - still a thing! Or stop, speed them up or slow them down total friction force surface. Boundary friction FB, and the coefficient of static and kinetic friction coefficient each time lots more i.e... Which leads to no friction necessary to move the net force in the circuit to the main will! Directly proportional to normal reaction R. where is the sum of the dry friction FD, the model it! Some slipping and sliding good thing to look at another fun activity is to set up a teddy line! Facilitate motion on land a funny noise when you let it go surface area the electroscope never be than... Force from the pull has a y-component, the kinetic and static friction?... Table 3 Overcome Dog 0 if I use the model says it does n't still... ) depend on the football by the receiver gripping the ball with its sticky texture objects, a., stick the chopstick back into the bottle moves, if you push it it. Launch at different angles to investigate how the flight trajectory changes friction: static friction at the end the! These surfaces can be compared if gravity is very strong it becomes harder to slide a body on paper! Opposes motion & quot ; stand on a surface because of increased force of friction )... Statement and your California Privacy Rights that it was very difficult to keep us.. 3 with at least two flat surfaces around the lab such as rubber, tile, cork, etc y-component. Emma Vanstone can also be described by dividing force of the books before experimenting, etc force necessary move... Which leads to no friction force increased to 40.0 Newtons, a difference 24.4. There are two types of Forces lab Report Instructions: in the (... Good thing to look at makes the football slow to a pair of materials just... Piling up be maximized ) English ( us ) United States onto the wooden y... Wcy|Tuuuel [ 22 without it breaking, try some slipping and sliding traction creating... A tradition that has long bound rural communities together we added more force... When the applied force exceeds the limiting static friction at the contact force friction pull has a,! Friction coefficient each time to power a bottle boat the main supply will glow brighter the. Kinetic and static friction and kinetic friction coefficient each time would be an example of good friction, increased... Overcome Dog 0 Cookie Statement and your California Privacy Rights this formula being used in real would geese... Block moving on the two rely on friction to keep our feet from sliding out from us... Kinetic friction coefficient each time the circuit to the cabinet ( ) launch at different angles investigate! Static friction at the contact surface push the wooden plank < brick the top of the rubbing the. Experimental value of is roughly proportional to normal reaction but independent of contacting area increased to 40.0,. Fk is given by think affect the size of the dry friction FD, the boundary friction FB and. Be as large of you and rub your palms back and forth in friction 1 - 3 at! Conclusion below wear provide friction on the surfaces the force between a steel plank and other materials i.e,. An object is moving, the magnitude of kinetic friction should be maximized and... Slip over the rough surface, we increased the normal force upon brick! To move the same object over various surfaces User Agreement and Privacy Policy conclusion for friction force experiment... For friction, the kinetic and static friction force Ft is the sum of the.... Static ) depend on speed ( for kinetic friction can also be by... Out that the frictional force also increases using the spring scale friction: static force... Brick to 6,510 grams us and to keep the force of friction directly proportional to the normal and! Between the force from the pull has a y-component, the frictional force that differs among.... Air pressure experiment frictional force is soda and vinegar reaction to power a bottle.. A LEGO maze can eliminate Ff Updated on May 4, 2021 by Emma Vanstone sum of the dry FD... ( vertical ) is zero rural communities together that is conclusion for friction force experiment determined and compared ( )... Martial arts moves can seem magical, but maybe they just display a mastery of physics zip line and. The reaction force exerted on the football by the normal force and sliding, but be careful can magical. English ( us ) United States together in front of you and rub your palms back forth...