# A model train, with a mass of #2 kg#, is moving on a circular track with a radius of #3 m#. If the train's kinetic energy changes from #3 j# to #5 j#, by how much will the centripetal force applied by the tracks change by?

##### 1 Answer

#### Explanation:

For Circular Motion, Centripetal Force

Where

Now velocity

Therefore, magnitude of the force

Kinetic energy is given by

Let the velocity of the train change from

Given is change in kinetic energy

or

or

Change in the centripetal force applied by the tracks

Inserting value of

Change in the centripetal force applied by the tracks