An electric trimmer blade has rotational inertia 1.55×10−4 kg*m^2.
What torque is needed to accelerate this blade from rest to 620 rpm in 1.35 s?
How much work was done to accelerate the blade?

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F = ma
F = torque
accn = find angular accn
mass = inertia

Torque is 7.45*10^-4 N*m

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