Gujarat BoardEnglish MediumSTD 9ScienceWork, Power And Energy1 Mark
Question
A load of $100\ kg$ is pulled up by $5\ m$. Calculate the work done.$ (8 = 9.8m/s)$
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Answer
Mass $= 100\ kg$ Height $= 5\ m\ g = 9.8\ m/s^2$
$P.E. = m \times g \times h = 100 \times 5 \times 9.8 = 4900\ J$
Work done is equal to $PE$ acquired by the body.
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