In a competition, participants must attempt to throw a ball vertically upwards past
point T, marked on a tall vertical pole. Point T is 3,7 m above the ground. Point T may,
or may not, be the highest point during the motion of the ball.
One participant throws the ball vertically upwards at a velocity of 7,5 m.s-1 from a point
that is 1,6 m above the ground, as shown in the diagram below. Ignore the effects of
air resistance.
3.1 In which direction is the net force acting on the ball while it moves towards point T?
Choose from: UPWARDS or DOWNWARDS. Give a reason for the answer. (2)
3.2 Calculate the time taken by the ball to reach its highest point. (3)
3.3 Determine, by means of a calculation, whether the ball will pass point T or not. (6)
3.4 Draw a velocity-time graph for the motion of the ball from the instant it is thrown upwards until it reaches its highest point.
Indicate the following on the graph:
- The initial velocity and final velocity
- Time taken to reach the highest point (2)
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