(a)[1]
State the meaning of velocity.
(b(i))[2]
A student launches a ball over a vertical wall of height $h$, as shown in Fig. 2.1. The ball leaves the student’s hand from a point $1.2\,\text{m}$ above the level ground. Its initial velocity is $22\,\text{m s}^{-1}$ at an angle of $40^\circ$ to the horizontal. The wall is $36\,\text{m}$ horizontally from the release point. Air resistance is negligible. Determine the time for the ball to reach the wall.
(b(ii))[1]
Calculate the vertical component $u$ of the ball’s initial velocity.
(b(iii))[3]
The ball passes just above the wall. Calculate the height $h$ of the wall.
(c(ii))[1]
Calculate the vertical component $u$ of the ball’s initial velocity.
(c(iii))[3]
The ball passes just above the wall. Calculate the height $h$ of the wall.