Q
Kinetic friction is the________________?
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A
A. Tangent of angle between normal reac-tion and the resultant of normal reac-tion and the limiting friction
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B
B. Ratio of limiting friction and normal reaction
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C
C. The friction force acting when the body is just about to move
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D
D. The friction force acting when the body is in motion
Correct Answer:
D. D. The friction force acting when the body is in motion
