Question

A body with mass 2 kg falls freely from rest, from a height of 4 m. If acceleration due to gravity is 9.8 m/s2, determine the work done by the force of gravity.

Answer 1

We will determine the work as follows:

$W=m\cdot g\cdot h$

So:

$W=(2Kg)(9.8m/s^2)(4m)\Rightarrow W=78.4Kg\cdot m^2/s^2$$\Rightarrow W=78.4J$

So, the work done by the force of gravity is of 78.4 J.