A coolie carrying a load on his head and moving on a frictionless hori – InterviewSolution

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1.

A coolie carrying a load on his head and moving on a frictionless horizontal platform does no work. Explain the reason why.

Answer»

We know w = Fdcosθ.

Since force is normal to displacement. so θ = 90°

Hence work done W = Fdcosθ 90 = 0.

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