A uniform solid disk with a mass of 28.3 kg and a radius of 0.414 m is free to rotate about a frictionless axle. Forces of 90.0 N and 125 N are applied to the disk, as the drawing illustrates.(adsbygoogle = window.adsbygoogle || []).push({});

http://www.webassign.net/CJ/p9-31.gif

What is the net torque produced by the two forces? (Assume counterclockwise is the positive direction.)

What is the angular acceleration of the disk?

For the first question, I thought maybe to do:

90.0 N * r + 125 * r = 89.01

That is wrong.

I know of the eqn.

torque = I * alpha

but I dont know how to use it in this problem.

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# Homework Help: Another torque problem

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