A boy lifts a 1 kg block by 1 m- The work done by the boy is-0 J1 J9-8 J0-1 J

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Work Done against Gravity

A boy lifts a...

Question

A boy lifts a 1 kg block by 1 m. The work done by the boy is:

0 J

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9.8 J

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1 J

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0.1 J

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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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