# A model train with a mass of #4 kg# is moving along a track at #18 (cm)/s#. If the curvature of the track changes from a radius of #25 cm# to #42 cm#, by how much must the centripetal force applied by the tracks change?

##### 1 Answer

Oct 20, 2016

The centripetal force changes in a factor of

#### Explanation:

The centripetal force acting on a moving mass

If the path's radius is modified from a

Thus: