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Work Done When Force Is Varying

A body of mas...

Question

A body of mass $10 k g$ moves according to the relation $x = t^{2} + 2 t^{3}$ . The work done by the force in the first $2 s$ is.

A

7840 J

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B

1960 J

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C

3920 J

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D

4840 J

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Solution

The correct option is C $3920 J$

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