Physics Principles and Problems 2009

Section 5.2 : Friction

Self-Check Quizzes

1
Which is a type of friction you experience as you push a book across a table?
A)accelerated friction
B)kinetic friction
C)negative friction
D)static friction
2
What type of friction is involved with the action in this image?

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A)accelerated
B)kinetic
C)negative
D)static
3
According to this graph, which surface would offer more frictional force if a toy car was pushed across its surface?

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A)highly-polished table
B)rough table
C)sandpaper
D)none of these
4
The _____ friction force is equal to the product of the coefficient of the kinetic friction and the normal force.
A)kinetic
B)normal
C)potential
D)static
5
Friction always acts in a direction _____ to the motion.
A)equal
B)opposite
C)parallel
D)similar
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