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

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Solution

Find the work done:
Given data:
Mass, $(m) = 5 k g$
Height(h) $(h) = 2 m$
Acceleration due to gravity $g = 9.8 m s^{- 2}$ .
We know that work done formula, then
$W o r k d o n e = F o r c e (F) \times d i s p l a c e m e n t (s)$
Where $F = m g$ and $s = h$ then,
$W = m \times g \times h$
Substitute the values
$= 5 \times 9.8 \times 2 = 98 J$
Thus, the work done against the force of gravity is $98 J$

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