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- 1. Multiple Choice
Complete the sentence. Friction always ____________
Helps the motion
Opposes the motion
Both of these
None of these
- 2. Multiple ChoiceWhat does friction produce?lightsoundheatgravity
- 3. Multiple ChoiceWhat direction does friction act relative to motion?in the same directionin the opposite directionneed more informationdepends on the force
- 4. Multiple ChoiceThe amount of friction depends on the weight of the objects pressing together.TrueFalse
- 5. Multiple Choice
What type of friction is not moving?staticslidingfluidrolling - 6. 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
- 7. 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
- 8. 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
- 9. 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.
- 10. Multiple ChoiceWheels on a skateboard most likely experiences-Rolling FrictionSliding FrictionFluid FrictionStatic Friction
- 11. Multiple ChoiceHow does friction affect speed?more friction decreases speedmore friction increases speedless friction decreases speedless friction doesn't affect speed
- 12. 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
- 13. Multiple Choice
Imagine you decide to jump out of an airplane 🛩
Which force is going to pull you down towards earth
Fluid Friction
Static Friction
Gravity
The wind from the airplane
- 14. Multiple Choice
When you jump out of a plane to go skydiving 🪂 you thankfully have a parachute so you can safely land 🛫. Which answer choice explains why the parachute helps you land safely
While gravity pulls you down very quickly, Air Resistance (fluid friction) pushes back against gravity and your parachute, slowing you down
While gravity pushes you down very slowly, Air Resistance (fluid friction) pulls back against gravity and your parachute, which means you can land safely
When you have a parachute gravity is not able to pull you down as fast as it normally can
The parachute will get caught on something on your way down which will save your life
- 15. Multiple Choice
these are used to reduce unwanted heat in cars
powder
oil
coolants
- Answer choicesTagsAnswer choicesTags