Physics (AS & A Level) · Oct / Nov 2020 · Paper 12 · Question 9

An object falls from a tall building. The graph shows how the velocity of the object changes with time t. [graph of velocity against time t, curve rising from origin and levelling off, with times Y and Z marked] The acceleration of free fall is g. What describes the acceleration of the object at times t = Y and t = Z?

1. Aacceleration at t = Y: decreasing; acceleration at t = Z: g
2. Bacceleration at t = Y: decreasing; acceleration at t = Z: 0
3. Cacceleration at t = Y: constant; acceleration at t = Z: g
4. Dacceleration at t = Y: constant; acceleration at t = Z: 0

As printed in the paper