A model train, with a mass of #12 kg#, is moving on a circular track with a radius of #3 m#. If the train's rate of revolution changes from #7 Hz# to #3 Hz#, by how much will the centripetal force applied by the tracks change by?

1 Answer
Feb 13, 2017

Answer:

The change in centripetal force is #=22739.6N#

Explanation:

The centripetal force is

#F=mr omega^2#

The variation in centripetal force is

#DeltaF=mr(Delta omega)^2#

#=12*3*((7-3)2pi)^2#

#=36*64*pi^2#

#=22739.6N#