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Sam dropped a ball from a height of 200 cm. Find out (a) how long it...

Sam dropped a ball from a height of 200 cm. Find out (a) how long it will take to hit the ground and (b) what would be its velocity when it hits the ground? (c) If mass of the ball is 500 g, what would be its kinetic energy when it hits the ground? (d) What would be its potential energy before its fall?

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