Kinetic friction may be defined as

1.	Kinetic friction may be defined as
A.	friction force acting when the body is just about to move
B.	friction force acting when the body is in motion
C.	angle between normal reaction and resultant of normal reaction and limiting friction
D.	ratio of limiting friction and normal reaction.
Answer» C. angle between normal reaction and resultant of normal reaction and limiting friction

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Kinetic friction may be defined as

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