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- 1. Multiple ChoiceA type of friction that occurs when air pushes against a moving object causing it to negatively acceleratesurface areaair resistancedescent velocitygravity
- 2. Multiple ChoiceHow does friction affect speed?more friction decreases speedmore friction increases speedless friction decreases speedfriction has no effect on speed
- 3. Multiple ChoiceWhich of the following is an example of friction that is helpful?Brakes used on a bikeTires from a car on the roadTread on the bottom of your shoesAll are examples that are helpful
- 4. Multiple ChoiceHow can friction be reduced?reduce the force acting between the 2 surfacesreduce the roughness of the 2 surfaces coming in contactuse wax, grease or oilall of the above are ways of reducing friction
- 5. Multiple ChoiceWhich would NOT be a way of reducing friction?making the surfaces smootherusing lubricants such as waxes, oils, or greasechanging from sliding friction to rolling friction using ball bearingsusing kitty litter on snow and ice to help your car gain traction
- 6. Multiple ChoiceWhat are 2 factors that determine the amount of friction between 2 objects?Force and roughness between surfacesHills and valleys and how smooth or rough the surface isAmount of force and amount of surface the comes in contactThe force and the weight exerted on the surfaces
- 7. Multiple ChoiceFriction is a force that acts in an ___________ direction of movement.similaroppositeparallelwest
- 8. Multiple ChoiceWhy is it important for basketball players to wear shoes with tread when playing?to increase the speed of the playerto decrease the force between the player and the floorto increase friction between the floor and the player’s feetto decrease the amount of force needed for the player to move
- 9. Multiple ChoiceThere is more friction between _________ surfaces.smoothslipperyhardrough
- 10. Multiple ChoiceOn which surface will a toy sledge travel the least distance?CarpetPolished WoodIceOiled ramp
- 11. Multiple ChoiceTwo toy race cars are going to be raced down the same ramp. Which information is most helpful in predicting which car will win the race?length of the rampvolume of the carsslope of the rampmass of the cars
- 12. Multiple ChoiceWhich of the following would increase the motion of a toy car after it is pushed?a flat, grassy surfacea smooth surface sloped uphilla smooth surface sloped downhilla rough, grassy downhill surface
- 13. Multiple ChoiceWhich material should be used on a bicycle ramp to increase friction?shiny metalrough papersmooth woodwet plastic
- 14. Multiple ChoiceFour cars are at the starting line of a race. Which car will require the most force to start moving?car with mass of 1200 kilogramscar with mass of 1500 kilogramscar with mass of 1700 kilogramscar with mass of 2000 kilograms
- 15. Multiple ChoiceMolly is trying to improve on hitting a softball. Which will most likely help to improve Molly’s hitting?a lighter ball and a lighter bata heavier ball and a lighter bata lighter ball and a heavier bata heavier ball and a heavier bat
- 16. Multiple ChoiceSomething with a greater mass requires a(n) _____ force to move it.greaterlesserequalopposite
- 17. Multiple ChoiceWhich of the following statements is true?Friction is a force that only occurs between solidsFriction is a force that only occurs on rough surfacesFriction is a force that only occurs when surfaces touch each otherFriction is a force that only occurs on smooth surfaces
- 18. Multiple Choice
Oil between machine parts would be an example of which type of friction?staticslidingfluidrolling - 19. Multiple ChoiceWheels on a skateboard most likely experiences-Rolling FrictionSliding FrictionFluid FrictionStatic Friction
- 20. Multiple ChoiceSally experiences-Rolling FrictionSliding FrictionFluid FrictionStatic Friction
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