To what height should a box of mass $150\ kg$ be lifted, so that its potential energy may become $7350\ joules$? $(g=9.8\ m/s^2)$.

Here given, mass of the body $m=150\ kg$

Potential energy $P=7350\ Joule$

Gravitational acceleration $g=9.8\ m/s^2$

Let the body be lifted to the height $h$.

On using the equation $P=mgh$

Or $7350=150\times 9.8\ times h$

Or $7350=1470h$

Or $h=\frac{7350}{1470}$\

Or $h=5\ m$

Therefore, the box of mass $150\ kg$ should be lifted to the height of $5\ m$, so that its potential energy may become $7350\ joules$.

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Updated on: 10-Oct-2022

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