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- 1. Multiple ChoiceThe amount of friction depends on the weight of the objects pressing together.TrueFalse
- 2. 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
- 3. 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.
- 4. Multiple ChoiceRougher surfaces have ...greater frictionless frictionthe same level of friction
- 5. Multiple ChoiceHow does friction affect speed?more friction decreases speedmore friction increases speedless friction decreases speedless friction doesn't affect speed
- 6. Multiple Choice
A contact force is from
objects physically touching
far apart objects
not touching object
always a pull
- 7. Multiple Choice
Friction is a
Contact Force
Myth
Non-contact Force
- 8. Multiple Choice
A ball rolls down from the top of a grassy hill, reaches the bottom of the hill, continues to roll, and then starts to slow down and comes to a stop. What forces caused this ball's motion?
Frictional force caused the ball to roll down the hill, but air resistance caused the ball to slow down and stop.
Magnetic force caused the ball to roll down the hill, but gravity caused the ball to slow down and stop.
The force of the hill caused the ball to roll down it, but gravity caused the ball to slow down and stop.
Gravity caused the ball to roll down the hill, but frictional force caused the ball to slow down and stop.
- 9. Multiple ChoiceThe rougher the surface, the faster an object will travel over the surface.TrueFalse
- 10. Multiple ChoiceThe force that acts in the opposite direction of motion when two surfaces come in contact.ForceFrictionStaticKinetic
- 11. Multiple Choice
without friction, an object in motion would never stop
true
false
- 12. Multiple Choice
these are examples of lubricants
oil,
grease
powder
all of the above
- Answer choicesTagsAnswer choicesTags