# 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 # 4 Hz# to # 12 Hz# in # 3 s#, what torque was applied to the object?

##### 1 Answer

Apr 10, 2017

The torque was

#### Explanation:

The torque is the rate of change of angular momentum

For the object, the moment of inertia is

So,

The rate of change of angular velocity is

So the torque is