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Physics
Which of the following statements about friction is true?
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Q. Which of the following statements about friction is true?
Laws of Motion
A
Friction can be reduced to zero.
12%
B
Frictional force cannot accelerate a body.
15%
C
Frictional force is proportional to the area of contact between the two surfaces.
33%
D
Kinetic friction is always greater than rolling friction.
41%
Solution:
Correct answer is (d) Kinetic friction is always greater than rolling friction.