A boy weighing 50 kg eat some bananas. The energy content of the bananas is 1000 cal . If the boy uses all of this energy to jump upwards from the ground, then the height up to which his centre of mass will rise is [mechanical equivalent of

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A boy weighing 50 kg eat some bananas. The energy content of the bananas is 1000 cal . If the boy uses all of this energy to jump upwards from the ground, then the height up to which his centre of mass will rise is [mechanical equivalent of heat = 4 . 2 J cal - 1 , g = 10 m s - 2 ]

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Correct answer: 8.4

Energy used by the boy is E = 1000 × 4 . 2 J ⇒ 4200 = 50 × 10 × h ⇒ h = 8 . 4 m

A boy weighing 50 kg eat some bananas. The energy content of the bananas is 1000 cal . If the boy uses all of this energy to jump upwards from the ground, then the height up to which his centre of mass will rise is [mechanical equivalent of heat = 4 . 2 J cal - 1 , g = 10 m s - 2 ]

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