# An object with a mass of # 2 kg# is traveling in a circular path of a radius of #4 m#. If the object's angular velocity changes from # 1 Hz# to # 8 Hz# in # 3 s#, what torque was applied to the object?

##### 1 Answer

Jul 14, 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