# An object with a mass of # 3 kg# is traveling in a circular path of a radius of #9 m#. If the object's angular velocity changes from # 9 Hz# to # 14 Hz# in # 8 s#, what torque was applied to the object?

##### 1 Answer

Mar 15, 2018

The torque is

#### Explanation:

The torque is the rate of change of angular momentum

where

For the object,

The mass is

The radius of the path is

So the moment of inertia is

,

The angular acceleration is

So,

The torque is