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Question: The force required to just move a body up the inclined plane is double the force required to just pr...

The force required to just move a body up the inclined plane is double the force required to just prevent the body from sliding down the plane. The coefficient of friction is µ. The inclination q of the plane is –

A

tan–1 µ

B

tan–1(µ/2)

C

tan–1

D

tan–1

Explanation

Solution

Force required to stop sliding

F1 = (mg sin q – µ mg cosq)

Force required to pull upwards

F2 = (mg sinq + µ mg cos q)

F1 = 2F2