Question

A brick stone of mass $5kg$ is at a height above the ground. If the potential energy of the stone is $100J$. Find the height of the stone with respect to the ground (in metre).
(Take $g=10m{s}^{-2}$)

• A. 2

Answer 1

The correct option is A 2
Given,
Mass of the stone, $m=5kg$
Potential energy $=100J$
Acceleration due to gravity, $g=10m{s}^{-2}$
Height, $h=?$

We know,
Potential energy$=mgh$
$100=5\times 10\times h$
$100=50\times h$

$\therefore h=\frac{100}{50}=2m$