In which of the following cases is work being done :

(a) A boy pushing a heavy rock

(b) A boy climbing up the stairs

(c) A coolie standing with a box on his head

(d) A girl moving on the road.

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Solution

Answer:
(b) A boy climbing up the stairs
(d) A girl moving on the road.

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Similar questions

State whether work is done or not by writing yes or no, in the following cases:

(a) A man pushes a wall.

(b) A coolie stands with a box on his head for 15 min.

A boy of mass m climbs up the stairs of vertical height h.

(a) What is the work done by the boy against the force of gravity?

(b) What would have been the work done if he uses a lift in climbing the same vertical height?

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