Question

a horizontal force of 60n is required to keep a body moving in a horizontal direction with constant velocity. what is the work done by the frictional force when the displacement of a body is 4m​

Answer 1

Answer:

Here the force donot accelerates the body

20N is required to keep the body in uniform velocity

so 20N force is acting oposit to the motion of the body by the friction

so for a displacement of 2m work done by frictional force=2×20=40

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