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## Homework Statement

The rotor of an electric motor of mass 200 kg has a radius of gyration of 150 mm. Calculate the torque required

to accelerate it from rest to 1,500 rev/min in 6 seconds. Friction resistance may be neglected.

## Homework Equations

ƩM

_{O}= Iα

I = 1/2 (mr

^{2}

I am really really stuck here, I don't know what equations I need to use, if this were a straight line question I would use v = u + at, but it isn't so that is wrong

## The Attempt at a Solution

All I have so far is this

I = 1/2 (mr

^{2}

I = 0.5 * 200 * 0.15

^{2}

I = 2.25 kgm

^{2}

Really lost. I just need some pointers please.

Kind regards

Rob