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- 1. Multiple ChoiceWhat is the unit called that measures force?weightmeterNewtonkilogram
- 2. Multiple Choice
Which of these does friction produce?
light
sound
heat
gravity
- 3. Multiple ChoiceWhat direction does friction act relative to motion?in the same directionin the opposite directionneed more informationdepends on the force
- 4. Multiple ChoiceHow does friction affect speed?more friction decreases speedmore friction increases speedless friction decreases speed
- 5. Multiple ChoiceThe rougher the surface, the faster an object will travel over the surface.TrueFalse
- 6. Multiple ChoiceFriction is a force that acts in an ___________ direction of movement.similaroppositeparallelwest
- 7. Multiple Choice
When there is friction, the energy of an object's motion is converted into _______ energy
heat
kinetic
stronger
friction
- 8. Multiple ChoiceA puck slides along an icy surface. What makes it slow down?It runs out of pushIt rubs against the iceIt runs out of electricity
- 9. Multiple ChoiceRougher surfaces have ...greater frictionless frictionthe same level of friction
- 10. Multiple Choice
What are the 2 types of friction discussed in the video?
Static and Dynamic Friction
Kinetic and Static Friction
Kinetic and Dynamic Friction
Dynamic and Moving Friction
- 11. Multiple Choice
What are 2 factors that determine the amount of friction between 2 objects?
Roughness and the force between the surfaces
hills and valleys and how smooth or rough the surface is
Amount of force and amount of surface the comes in contact
The force and the weight exerted on the surfaces
- 12. 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
- 13. 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
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