# A model train, with a mass of #12 kg#, is moving on a circular track with a radius of #9 m#. If the train's rate of revolution changes from #6 Hz# to #8 Hz#, by how much will the centripetal force applied by the tracks change by?

##### 1 Answer

Mar 11, 2016

The change in Centripetal Force will be

#### Explanation:

Here:

We know:

*Centripetal Force*

For first rate of revolution. i.e.

For second rate of revolution. i.e.

The change in Centripetal Force will be