20 kg mass and it's velocity is 5m per second to 2m per second .calculate the work done
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Work done = final k. e. - initial k. e.
= 1/2 mv2 - 1/2 mu2
= 1/2 * 20*4 - 1/2 *20* 25
= 40J - 250J
= - 210J
Hence the work done is of 210J.
= 1/2 mv2 - 1/2 mu2
= 1/2 * 20*4 - 1/2 *20* 25
= 40J - 250J
= - 210J
Hence the work done is of 210J.
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