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The top has a moment of inertia of 3.10 ? 10-4 kg

The top has a moment of inertia of 3.10 ? 10-4 kg

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Answer #1

Work done on the top is

W = F. d

   = 5.4*.8 = 4.32 Nm

W = (1/2) I w^2

angular speed w = sqrt [2 W/I ]

                         = sqrt [ 2(4.32)/3.1x10^4 ]

                         = 167 rad /s

In rev the angular speed 167 /2pi = 26.6 rev/s

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