(a(i))[2]
Calculate the horizontal component $v_H$ and the vertical component $v_V$ of the ball’s velocity just after it leaves the ground.
(a(ii))[1]
Show that the ball is at its maximum height when $t = 1.6\,\text{s}$.
(a(iii))[1]
On Fig. 1.2, sketch how $v_H$ varies with time $t$ from $t=0$ to $t=3.2\,\text{s}$. Take the upward direction as positive for velocity. Label the line H.
(a(iv))[3]
On Fig. 1.2, sketch the variation of $v_V$ with time $t$ from $t=0$ to $t=3.2\,\text{s}$. Assume that upward velocity is positive. Label your line V.
(b(i))[1]
The ball’s total change in momentum from leaving the ground at $t=0$ to landing on the ground at $t=3.2\,\text{s}$ is $13\,\text{kg m s}^{-1}$. Define momentum.
(b(ii))[2]
Calculate the force acting on the ball while it is in the air.
(b(iii))[1]
Determine the ball’s mass.