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- 1. Multiple ChoiceFriction is a force that acts in an ___________ direction of movement.similaroppositeparallelwest
- 2. Multiple Choice
How 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 - 3. Multiple ChoiceA type of friction that occurs when air pushes against a moving object causing it to decelerate.surface areaair resistancevelocitygravity
- 4. 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
- 5. Multiple ChoiceWhich of the following is an example of friction that is harmful?Pencil marking on paperEngine parts wearing outsand placed on ice in the winterUsing an eraser to erase marks
- 6. Multiple ChoiceHow would the absence of friction affect a marble traveling on a long, straight path?The marble’s speed would decrease.The marble’s speed would increase.The marble would stop immediately.The marble would remain at constant speed.
- 7. Multiple ChoiceRougher surfaces have ...greater frictionless frictionthe same level of friction
- 8. 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
- 9. Multiple ChoiceWhat does friction produce?lightsoundheatgravity
- 10. Multiple ChoiceWhat is the unit called that measures force?weightmeterNewtonkilogram
- Answer choicesTagsAnswer choicesTags