# A model train, with a mass of #4 kg#, is moving on a circular track with a radius of #7 m#. If the train's rate of revolution changes from #1/12 Hz# to #1/3 Hz#, by how much will the centripetal force applied by the tracks change by?

##### 1 Answer

Aug 23, 2017

The change in centripetal force is

#### Explanation:

The centripetal force is

The mass is

The radius

The change in angular velocity is

The variation in centripetal force is