A flywheel of moment of inertia 2 kg m2 is speeded up from 10 rad/s to 20 rad/s. The work done on it is
A flywheel of moment of inertia 2 kg m2 is speeded up from 10 rad/s to 20 rad/s. The work done on it is
A. 100 J
B. 200 J
C. 400 J
D. 300 J
1 answer
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Answer: D. 300 J
\(W=\Delta KE=\frac12 I(\omega_2^2-\omega_1^2)=\frac12(2)(400-100)=300\) J.
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· 23 Oct 2026
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