Mathematics (AS & A Level) · Feb / March 2021 · Paper 42 · Question 4

t (s) v (m s−1) 2 −V 21.5 20 15 13 7 6 1.5 0 0 An elevator moves vertically, supported by a cable. The diagram shows a velocity-time graph which models the motion of the elevator. The graph consists of 7 straight line segments. The elevator accelerates upwards from rest to a speed of 2 m s−1 over a period of 1.5 s and then travels at this speed for 4.5 s, before decelerating to rest over a period of 1 s. The elevator then remains at rest for 6 s, before accelerating to a speed of V m s−1 downwards over a period of 2 s. The elevator travels at this speed for a period of 5 s, before decelerating to rest over a period of 1.5 s.

Read automatically from the paper; the printed page above is exact.