30. A ball of mass 200 g falls from a height of 5 metres. What is its kinetic energy when it just reaches the
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Answer:
height = 5m
mass = 200g
potential energy = mgh = 0.2 ∗ 5 ∗ 9.8 = 9.8J
Since potential energy at the highest point is equal to kinetic energy at lowest point , therefore kinetic energy will be 9.8J
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