Question

a coolie carries luggage of a passenger along a long platform at a railway station. Has he done work on the language why​

Answer 1

Scientifically,no,. The coolie has not done any work since though he is applying force in upward direction,the displacement of the object occurs in forward direction,creating a 90 degree angle .

That is why zero work is done.

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Answer 2

The work done is 0 because the angle between the ground and the laguage he is carrying is 90 degree