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A planet whose size is the same and mass...

A planet whose size is the same and mass `4` times as that of Earth, find the amount of energy needed to lift a `2 kg` mass vertically upwards through `2m` distance on the planet. The value of `g` on the surface of Earth is `10 ms^(-2)`.

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On a planet whose size is the same and mass four times as that of our earth, find the amount of work done to lift 3 kg mass vertically upwards through 3 m distance on the planet. The value of g on the surface of earth is 10 ms^(-2)

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SL ARORA-FLUIDS AT REST-Problem for self practice
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