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Work Done by Force of Gravity

How much ener...

Question

How much energy is gained by a box of mass $20 k g$ when a man $(g = 10 m s^{- 2})$ Raises the box by $0.5 m$ in order to place it inside the bus ?

A

200 J

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B

0 J

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C

10 J

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D

100 J

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Solution

The correct option is C $100 J$
$W = F \times S$
$F = m \times g = 20 \times 10 = 200 N$
$W = 200 \times 0.5 = 100 J$
Hence work done by the bus is $100 J$ .

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