# An object with a mass of # 7 kg# is traveling in a circular path of a radius of #9 m#. If the object's angular velocity changes from # 2 Hz# to # 23 Hz# in # 8 s#, what torque was applied to the object?

##### 1 Answer

Jul 7, 2017

The torque was

#### Explanation:

The torque is the rate of change of angular momentum

where

For the object,

So,

The rate of change of angular velocity is

So the torque is