Question

If a $5kg$ mass is raised to a height of $2m$, calculate the work done against the force of gravity.

Answer 1

Find the work done:

Given data:

Mass, $\left(m\right)=5kg$

Height(h) $\left(h\right)=2m$

Acceleration due to gravity $g=9.8m{s}^{-2}$.

We know that work done formula, then

$Workdone=Force\left(F\right)\times displacement\left(s\right)$

Where $F=mg$ and $s=h$ then,

$W=m\times g\times h$

Substitute the values

$$\begin{gathered} =5\times 9.8\times 2 \\ =98J \end{gathered}$$

Thus, the work done against the force of gravity is $98J$