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- 1. Multiple Choice
Friction is an example of _____________
contact force
non contact force
both of these
none of these
- 2. Multiple Choice
The direction of force of friction is always _____ to the direction of motion
same
opposite
unchanged
none of these
- 3. Multiple Choice
Without friction, an object in motion would never stop.
true
false
- 4. Multiple Choice
Frictional force depends on ____
surface area in contact
roughness of surface
both a and b
none of the above
- 5. Multiple Choice
Which of these materials do you predict would have the MOST amount of friction?
metal
tile
sand paper
denim
- 6. Multiple Choice
The rouugher the surface, the faster an object will travel over the surface
true
false
- 7. Multiple Choice
How would the absence of friction affect a marble travelling on a long, straight path?
the marble's speed would decrease
the marble would remain at a constant speed
the marble's speed would increase
the marble would stop immediately
- 8. Multiple Choice
The amount of friction depends on the weight of the objects pressing together
false
true
- 9. Multiple Choice
Rough surfaces have _________
greater friction
less friction
the same level of friction
- 10. Multiple Choice
When we rub our hands together _________.
frictional force works between them
energy is released
our hands become warm
all off the above
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