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How much momentum will a dub bell of mass 10 kg transfer to the floor if it falls from a height of 80cm? Take its downward accerlation to be 10 metre per second. |
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Answer» Answer: 40 kg m/s Explanation: The momentum transferred will be equal to the momentum of the dum bell RIGHT before touching the GROUND. a = 10 m/s² u = 0 m/s v² = u² +2 AH = 0² + (2 x 0.8 x 10) = 0 + 16 v = √16 v = 4 m/s m = 10 kg P = m v = 10 x 4 kg m/s =40 kg m/s |
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