Q. A boy of mass climbs up a conveyor belt with a constant acceleration. The speed of the belt is and the coefficient of friction between the boy and conveyor belt is . The boy starts from and moves with the maximum possible acceleration till he reaches the highest point

Work done by friction on the boy is

Work, Energy and Power Report Error

A

Equal to work done by boy

B

Equal to work done by the motor in running the conveyor belt

C

Zero

D

None of above

Solution:

Solving, we get

Distance moved by conveyor belt till the boy reaches :

w.r.t. conveyor belt, distance moved by the boy,

Work done by gravity w.r.t. conveyor,

From the frame of belt:

From the frame of ground:

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