# A model train, with a mass of #6 kg#, is moving on a circular track with a radius of #7 m#. If the train's rate of revolution changes from #4 Hz# to #2 Hz#, by how much will the centripetal force applied by the tracks change by?

##### 1 Answer

Jun 15, 2017

#### Answer:

The centripetal force changes by

#### Explanation:

The centripetal force is

The mass is

The radius

The change in the angular velocity is

The variation in centripetal force is