# A model train with a mass of #9 kg# is moving along a track at #18 (cm)/s#. If the curvature of the track changes from a radius of #24 cm# to #42 cm#, by how much must the centripetal force applied by the tracks change?

##### 1 Answer

Nov 21, 2016

The centripetal force applied by the tracks change is

#### Explanation:

Centripetal force

As we know change in force '

So

Conversion into metres for SI units

Similarly to the velocity

Substituting these values in above force equation we get,