Test Academy | When a 4 kg mass is hung vertically on a light spring that obeys Hooke’s law, the spring stretches by 2 cms. The work required to be done by an external agent in the stretching this spring by 5 cms will be (g = 9.8 m/s²) 4.900 J, 2.450 J, 0.495 J, 0.245 J

Question

When a 4 kg mass is hung vertically on a light spring that obeys Hooke’s law, the spring stretches by 2 cms. The work required to be done by an external agent in the stretching this spring by 5 cms will be (g = 9.8 m/s²)

Options :

4.900 J
2.450 J
0.495 J
0.245 J

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