# A model train, with a mass of #32 kg#, is moving on a circular track with a radius of #3 m#. If the train's kinetic energy changes from #18 j# to #21 j#, by how much will the centripetal force applied by the tracks change by?

##### 1 Answer

Mar 4, 2018

#### Answer:

#### Explanation:

suppose,initial velocity was

so,

Now,change in centripetal force will be