Consider the following statements and identify the correct statements
A) Frictional force always opposes motion
B) Static frictional force is always greater than kinetic frictional force for a given pair of surfaces.
C) Frictional force is a non conservative force

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Only C is true

All statements are true

Only B is true

Only B and C are true

answer is C.

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Detailed Solution

Work done by frictional force depends upon the path followed by the object. Also when a body makes a round trip under the action of frictional force, its kinetic energy decreases. So frictional force is non-conservative force. Maximum static friction is more than kinetic friction but not any static friction. Friction in many cases support the motion.

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