A flywheel has a mass of 25kg has a radius of 0.2m. What force should be applied tangentially to the rim of the flywheel so that it acquires an angular acceleration of 2rad/s2?

A flywheel has a mass of 25kg has a radius of 0.2m. What force should be applied tangentially to the rim of the flywheel so that it acquires an angular acceleration of 2rad/s2? Correct Answer 5N

M = 25kg, R = 0.2m, α = 2rad/s2 Moment of inertia of the flywheel about its axis, I = 1/2 MR2=1/2×25×0.22=0.5kgm2 As torque, τ = F×R=I×α Therefore, Force F = Iα/R=(0.5×2)/0.2=5N.
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