Given,
The mass, m=145 kg
The work done, W=21600 J
The work is the measure of energy transfer through the application of external force to move an object.
The work done is given by,
[tex]W=\Delta PE=mg\Delta h[/tex]Where ΔPE is the potential energy, g is the acceleration due to gravity, and Δh is the change in the height of the object.
On rearranging the above equation,
[tex]\Delta h=\frac{W}{mg}[/tex]On substituting the known values,
[tex]\begin{gathered} \Delta h=\frac{21600}{145\times9.8} \\ =15.2\text{ m} \end{gathered}[/tex]Thus the object was raised through a height of 15.2 m
