the child drops a stone of 1kg from the top of a tower . find its kinetic energy at 5 second after it start falling
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Explanation:
velocity gained by it 5 sec(v) = u+ g×t = 0+ 10×5 = 50m/s
K.E. of the stone = 1/2 × m v²
= 1/2 × 1 × 50² = 1250 J
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1250J
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