# A model train, with a mass of #6 kg#, is moving on a circular track with a radius of #4 m#. If the train's kinetic energy changes from #27 j# to #36 j#, by how much will the centripetal force applied by the tracks change by?

##### 1 Answer

Jul 22, 2017

The change in centripetal frce is

#### Explanation:

The centripetal force is

The kinetic energy is

The variation of kinetic energy is

The radius is

The variation of centripetal force is