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Q7 10m/s O A ball is dropped from a height of 50m. It bounces back up at a speed of 10ms 1. It has a

Q7 10m/s O A ball is dropped from a height of 50m. It bounces back up at a speed of 10ms 1. It has a mass of 45 grams. a) Find the velocity of the ball before it hits the ground. (3) b) Find the change in momentum of the ball due to the collision with the ground. (3) c) If the ball is in contact with the ground for 4.2 x 1073 seconds, what force does it hit the ground with (3) [Total 9 marks]

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