# A model train, with a mass of #2 kg#, is moving on a circular track with a radius of #4 m#. If the train's kinetic energy changes from #4 j# to #16 j#, by how much will the centripetal force applied by the tracks change by?

##### 1 Answer

Feb 3, 2016

#### Answer:

I found an incrase of

#### Explanation:

We can consider an initial and final position and have: