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A women throws a cricket ball vertically upwards into the air. The ball leaves the womans hand 1.8m above the ground, with a speed of 9.7 m s-1. It rises and then falls back to the ground. By considering the energies involved, calculate the balls speed at the point at which it hits the ground.
You may assume that the acceleration due to gravity is 9.8m s-2 and you may neglect air resistance.
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