Question

An object of mass $12kg$ is at a certain height above the ground. If the potential energy of the object is $4800J$, find the height at which the object is with respect to the ground. (Given $g=10m{s}^{-2}$)

Answer 1

Step 1: Given Data

Mass (m) $=12kg$

Potential energy (P.E) $=4800J$

Acceleration due to gravity (g) $=10m{s}^{-2}$

Step 2: Formula used

$P.E=mxgxh$

Step 3: Finding the height

$$\begin{gathered} h=\frac{P.E}{mxg} \\ h=\frac{4800}{12x10} \\ h=40m \end{gathered}$$

Hence, the height at which the object is with respect to the ground is $40m.$