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Q.

A body of mass 10kg is raised from certain depth. By the time it is raised by 10m, if its velocity is 2ms1 , work done during this time is,

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a

980J

b

20J

c

1000J

d

960J

answer is D.

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Detailed Solution

W=mgh+12mv2

=(10×9.8×10)+12(10)(2)2

=980+20

=1000J

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A body of mass 10kg is raised from certain depth. By the time it is raised by 10m, if its velocity is 2 ms−1 , work done during this time is,