QUESTION 3 A bаll, A, is thrоwn verticаlly upwаrds frоm a height, h, with a speed оf 15 m ∙ s-1. AT THE SAME MOMENT, a second, identical ball, B, is dropped from the same height as ball A as shown in the attached diagram. Both balls undergo free fall and eventually hit the ground. USE UPWARDS AS POSITIVE. Right click on the following blue button to open the diagram in a new tab. 3.1 What does the term free fall mean? (2) 3.2 Calculate the time it takes ball A to return to its starting point. (4) 3.3 Calculate the distance between ball A and ball B when ball A is at its maximum height. (7) 3.4 Sketch a velocity-time graph for the motion of ball A from the time it is projected until it hits the ground. Clearly show the following on your graph: • The initial speed • The time it takes to reach its maximum height • The time it takes to return to its starting point (4) [17]