Question

A coolie is walking on a levelled road with some load on his head. Calculate the work done by him. State the principle of conservation of energy. *
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Answer 1

Explanation:

work done by him is=0J

as the coolie holds baggages on his head which means he doing the work perpendicular which is always zero.

Answer 2

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● The work done will be zero because a coolie carries a load make an angle of 90 degree wherever the 90 degree created the work done will be zero.

Proof:

W = FS Cos Q

W = FS Cos (90°)

W = FS (0)

W = 0