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1、Research PlanSunny WuThe resistance of surface textureA. What surface texture has greater resistance?B. The more rough the surface is, the greater resistance it has.C. Let the plastic ball sliding down from the same height, from the same bevel, from standstill, for remaining the translational speed
2、same.The first time, place the smoothest board (board 1) in plane; let the plastic ball sliding down.Place the toothed board (board 2) on the board in plane; let the plastic ball sliding down.Place the rough board (board 3) on the board in plane; let the plastic ball sliding down.Take notes on the d
3、isplacement distance after the plastic ball sliding in plane. The next experiment, leave the blocks in plane for stopping the ball in same distance. Let the ball respectively run through three different boards. Take notes on the time of travel on different surfaces in the same distance. D. Bibliogra
4、phy1. Farmer, Jacqueline. Physics!, published by Watertown, MA. Copyright 1999. 2. Haslam, Andrew. How Einstein Ruined Physics: Motion, Symmetry, and Revolution in Science , published by World Book in association with Two-Can, Chicago, IL. Copyright 1997. Page 48.3. James, Ray. Matter and Motion, Pu
5、blished by Rourke Pub., Vero Beach, Fla. Copyright 2007. Page 24.4. Kalman, Bobbie. Surface Engineering, published by Crabtree Pub., NY. Copyright 2003. Page 32. 5. Sirett, Dawn , Science and Practice of Strength Training, published by DK Pub., New York. Copyright 2009. IntroductionFriction takes pl
6、ace everywhere. If theres no friction, people couldnt walk, and people couldnt make a fire with the aid of friction (Jacqueline,1999). Friction plays an essential role in humans life. But also friction often produces resistance, resulting in the loss of energy(James,2007). So how to reduce the frict
7、ion resistance will be a serious question. First, we need to know what surface texture has the greater resistance.When two objects touch each other, elastic force takes place, and when relative movement happens or is going to happen between these two objects, there will be a kind of force takes plac
8、e that will hinder the movement. We call this force the friction (Andrew,1997). The pressure of the object will affect the resistance (Bobbie,2003) . So the placement distance of the plastic ball will directly show us the resistance between the objects (Dawn,2009). The pressure of the object needs t
9、o remain the same during the experiment.I think if the texture is smooth, the friction resistance on the surface will be relatively small. Im going to use different kinds of board for the variable surface, so we can keep the textures are the same hardness. Let the plastic ball run through them in th
10、e same speed. I will find out the resistance difference from the displacement distance of the plastic ball. Then I will know what surface texture will have the greater resistance.Materials and MethodMaterials: Im going to use a board with bevel for giving the object impetus. There will be a plastic
11、ball that slid down from the bevel. I will use different kinds of board that are smooth or rough for the variable surface textures. Im going to use some blocks to let the plastic ball stop. Then I need a ruler for measure the distance and height, a stopwatch for measure the time.Method: Step 1: Let
12、the plastic ball sliding down from the same height, from the same bevel, from standstill, for remaining the translational speed same. Step 2: The first time, place the smoothest board (board 1) in plane; let the plastic ball sliding down. Step 3: Place the toothed board (board 2) on the board in pla
13、ne; let the plastic ball sliding down. Step 4: Place the rough board (board 3) on the board in plane; let the plastic ball sliding down. Step 5: Take notes on the displacement distance after the plastic ball sliding in plane. Step 6: The next experiment, leave the blocks in plane for stopping the ba
14、ll in same distance. Let the ball respectively run through three different boards. Step 7: Take notes on the time of travel on different surfaces in the same distance.ResultsIn the experiment, there will be different kinds of board to be the variable surface. Keep the height of drop and length of be
15、vel the same for controlling the speed of the plastic ball. Measure the length that traveled over variable surfaces to find out the resistance difference. And measure the time of travel on different surfaces in same distance. Then, repeat the experiment for several times.Surfaceboard 1123board 2123b
16、oard 3123length traveled over variable surfaces/cmTable 1:Travel distance of ball on different surface texturesTable 2: Time of travel on different surfaces in same distanceSurfaceboard 1123board 2123board 3123Time of travel/s Distance of travel/cmBibliography1. Farmer, Jacqueline. Physics!, published by Watertown, MA. Copyright 1999. 2. Haslam, Andrew. How Einstein Ruined Physics: Motion, Symmetry, and Revolution in Science , published by Wo
