# A model train with a mass of #5 kg# is moving along a track at #4 (cm)/s#. If the curvature of the track changes from a radius of #16 cm# to #2 cm#, by how much must the centripetal force applied by the tracks change?

##### 1 Answer

Apr 2, 2016

0.35N

#### Explanation:

We have that:

#m=5kg# #v=4 cm s^-1=0.04ms^-1# #r_1 =16cm = 0.16m # #r_2 = 2cm = 0.02m#

The centripetal force is given by:

Thus we can work out the change in centripetal force: