Fig. 9.1 shows a parachutist falling vertically towards the ground. [Figure 9.1] The mass of the parachutist is 60 kg and his weight is 600 N.

1. (a)(i)State what is meant by: mass[1]
2. (a)(ii)State what is meant by: weight.[1]
3. (b)Calculate the acceleration of the parachutist when the air resistance is 200 N.[3]
4. (c)(i)The parachutist falls from rest at time t = 0. He accelerates non-uniformly until he reaches a terminal velocity of 44 m/s at t = 30 s. At t = 40 s the parachute opens. He decelerates for 4.0 s, reaching a smaller terminal velocity of 5.0 m/s. He then falls at this speed until he lands on the ground at t = 200 s. On Fig. 9.2, draw the speed-time graph for the parachutist.[4]
5. (c)(ii)Calculate the average deceleration of the parachutist between t = 40 s and t = 44 s.[2]
6. (d)(i)Explain, in terms of the forces involved, why: the parachutist reaches a terminal velocity at t = 30 s[1]
7. (d)(ii)Explain, in terms of the forces involved, why: the parachutist decelerates when the parachute opens[2]
8. (d)(iii)Explain, in terms of the forces involved, why: the second terminal velocity, when the parachute is open, is smaller than the first.[1]

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.