# An object with a mass of # 3 kg# is traveling in a circular path of a radius of #15 m#. If the object's angular velocity changes from # 14 Hz# to # 23 Hz# in #9 s#, what torque was applied to the object?

##### 1 Answer

Jan 21, 2017

The torque was

#### Explanation:

The torque is the rate of change of angular momentum

The moment of inertia of the object is

The rate of change of angular velocity is

So the torque is