31. Consult Multiple-Concept Example 10 to review an approach to problems such as this. A CD has a mass of 17 g and a radius of 6.0 cm. When inserted into a player, the CD starts from rest and accelerates to an angular velocity of 21 rad/s in 0.80 s. Assuming the CD is a uniform solid disk, determine the net torque acting on it.

 

For a solid disk,

We know:

use

or

So putting this all together torque is

 

 

 

 

 

 

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This page last updated on January 11, 2020