# A model train with a mass of #4 kg# is moving along a track at #9 (cm)/s#. If the curvature of the track changes from a radius of #180 cm# to #63 cm#, by how much must the centripetal force applied by the tracks change?

##### 1 Answer

Feb 14, 2017

The centripetal force changes by

#### Explanation:

The centripetal force is

The change in centripetal force is

So,