(a)[1]
Define acceleration in mechanics.
(b)
A small aircraft is moving horizontally at $42\ \text{m s}^{-1}$ and is $63\ \text{m}$ above level ground, as shown in Fig. 1.1. At the instant shown in Fig. 1.1, it releases a small parcel. Air resistance is negligible.
(b(i))[1]
On Fig. 1.1, sketch the path followed by the parcel as it drops from the aircraft to the ground.
(b(ii))[2]
Calculate the interval from release until the parcel hits the ground.
(b(iii))[1]
Calculate the vertical component of the parcel’s velocity just before it reaches the ground.
(b(iv))[2]
Determine the speed of the parcel when it reaches the ground.