State Newton’s second law of motion in terms of resultant force and momentum change.
On Fig. 2.1, draw an arrow from point X to indicate the direction of the parcel’s acceleration at that point.
Determine the height $h$ of the parcel above the ground at the moment it is released.
Calculate the horizontal separation $d$ between points P and Q.
On Fig. 2.2, draw arrows to show the directions of the forces acting on the parcel as it falls vertically downwards. Label each arrow with the force name.
By considering the forces acting on the parcel, state and explain how, if at all, the parcel’s acceleration changes as it moves downward before it reaches constant (terminal) speed.
Describe the energy transfer that occurs when the parcel falls through the air at constant (terminal) speed.