Given that the mass of the book is m = 2kg.
The height of the book from the ground is h = 2 m.
We have to find the work done.
The formula to calculate work done is
[tex]\begin{gathered} W\text{ = Potential energy} \\ =\text{mgh} \end{gathered}[/tex]
Here, g =9.8 m/s^2 is the acceleration due to gravity.
Substituting the values, the work done will be
[tex]\begin{gathered} W=\text{ 2}\times9.8\times2 \\ =39.2\text{ J} \end{gathered}[/tex]
Thus, the work done will be 39.2 J.
