Question

Give reason. Workdone by a coolie carrying a luggage on his head is zero.​

Answer 1

Answer:

No there is no work done against the force of gravity because the displacement and the direction of force are at an angle of 90°. Explanation: Walking involves doing the same amount of work against gravity as standing, because the weight of the body is the same.

Answer 2

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A coolie carrying a luggage on his head moving on ground does no work against the force of gravity as displacement is normal to the direction of force of gravity.

Explanation:

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