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Work Done in Collision

When a 4 kg m...

Question

When a 4 kg mass is hung vertically on a light spring obey's Hooks law , the spring stretches by 2 cms. The work required to be done by an external agent in stretching this spring by 5 cm will be ( g =9.8 ${m s}^{- 2}$ )

A

4.9 J

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B

2.4 J

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C

0.495 J

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D

0.24 J

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Solution

The correct option is B 2.4 J

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