A body of mass $10 k g$ is dropped to the ground from a height of $10$ metre. The work done by the gravitational force is $(g = 9.8 m s^{- 2})$

- 490 J

- 980 J

+ 490 J

+ 980 J

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A body of mass 10 kg is dropped to the ground from a height of 10 metre. The work done by the gravitational force is (g=9.8 ms−2)

A body of mass $10 k g$ is dropped to the ground from a height of $10$ metre. The work done by the gravitational force is $(g = 9.8 m s^{- 2})$