A ball of mass $m$ is projected upwards through height $h$ in air with initial velocity $v$, as shown. The effect of air resistance is taken to be negligible. The acceleration of free fall is $g$. What is the total work done by the gravitational force on the ball as it travels from $P$ to $Q$?
- Azero
- B$\frac{1}{2}mv^2$
- C$mgh$
- D$2mgh$