A ball is projected vertically upward with an initial speed of 20ms−1. Treat upward direction as positive and assume air resistance is negligible.
(a) Draw the velocity–time graph for the motion of the ball from the instant of projection until it returns to the point of projection.
(b) Using the graph,
(i) determine the time at which the ball reaches its highest point,
(ii) calculate the maximum height attained,
(iii) find the total displacement and the total distance travelled in the complete trip (up and down).
(c) Compute the average acceleration for the entire duration of motion shown on your graph.