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06/01/2021 4:06 pm
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How much momentum will a dumb-bell of mass 10 kg transfer to the floor if it falls from a height of 80 cm? Take its downward acceleration to be 10 ms-2.
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06/01/2021 4:11 pm
Here, m = 10 kg, s = 80 cm = 0.8 m, a = 10 ms-2
u = 0, v = ?, p = ?
From, v2 - u2 = 2as, v2 - 0 = 2 x 10 x 0.8 = 16
or v = \(\sqrt{16} = 4 ms^{-1}\)
Momentum transferred, p = mv = 10 x 4
= 40 kg ms-1