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

##### 1 Answer

Oct 9, 2017

#### Answer:

The force will change by

#### Explanation:

The equation for centripetal force is

where

We know that the mass is

We know that

where

For

then

whereas with

so

Therefore the centripetal force will change by