# A model train, with a mass of #3 kg#, is moving on a circular track with a radius of #4 m#. If the train's rate of revolution changes from #3 Hz# to #2 Hz#, by how much will the centripetal force applied by the tracks change by?

##### 1 Answer

Feb 10, 2017

#### Answer:

The answer is

#### Explanation:

The centipetal force is

The variation in centripetal force is