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

Motor running, brakes applied. how much heat in joules will be dissipated?

mass 250 kg

diameter 30 cm

3000 rpm

torque 120 N-m

2. Relevant equations

W=1/2 *I *w^{2}

3. The attempt at a solution

I keep going the route of:

(1)/(2)*250*.3*315

1*125*.3*315

125*.3*315

37.5*315

11812.5 J

Can anyone show me what I am doing wrong?

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# Homework Help: Breaking Heat in Joules

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