A ball is released from rest from the top of a tall building and allowed to fall freely under gravity. After 3.0s its speed is found to be 29.4ms−1. Answer the questions below:
(i) Calculate the average acceleration of the ball during these 3.0s.
(ii) State the instantaneous acceleration of the ball while it is falling (take the magnitude of acceleration due to gravity as 9.8ms−2).
(iii) Comment on the equality or otherwise of the values obtained in parts (i) and (ii), explaining the reason briefly.