On Fig. 1.2 draw the speed-time graph for the skydiver. On your graph, label one point where the skydiver’s speed is increasing with an A and one point where the skydiver’s speed is constant with a B.
Explain how the graph shows that the acceleration decreases as the speed increases.
One of the vertical forces acting on the skydiver is her weight. State the name of the other vertical force acting on the skydiver.
Explain why the resultant vertical force eventually becomes zero.
At a particular instant, the vertical force on the skydiver is $400\,\text{N}$ downwards. At that same instant, the wind produces an extra horizontal force of $100\,\text{N}$ to the right on the skydiver. Draw a vector diagram to find the resultant of the $400\,\text{N}$ vertical force and the $100\,\text{N}$ horizontal force. Add an arrow to each force to show its direction. Find the magnitude (size) of this resultant force and its direction relative to the vertical.