Question

What is work done by a coolie luggage on his head while walking on a straight platform

Answer 1

work done = force × displacement

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