A body of mass $100\ kg$ is lifted up by $10\ m$. Find: (i) the amount of work done. (ii) potential energy of the body at that height $(value\ of\ g=10\ m/s^2)$.

(i). Here given, mass of the body $m=100\ kg$

Height $h=10\ m$

Gravitation acceleration $g=10\ m/s^2$

Therefore, work done to lift the body $W= mgh$

$=100\ kg\times 10\ m/s^2\times 10\ m$

$=100000\ Joule$

Therefore, work done to lift the body to $10\ m$ is $100000\ J$.

(ii). Potential energy of the body at that height will be equal to the work done to lift the body to that height. So, the potential energy will be $100000\ J$.

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Updated on: 10-Oct-2022

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