(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

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.

2. Relevant 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

3. 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

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Kinetics of Rigid bodies

**Physics Forums | Science Articles, Homework Help, Discussion**