A model train, with a mass of #2 kg#, is moving on a circular track with a radius of #2 m#. If the train's rate of revolution changes from #2 Hz# to #3 Hz#, by how much will the centripetal force applied by the tracks change by?

1 Answer
Feb 15, 2017

Answer:

The change in centripetal force is #157.9N#

Explanation:

The centripetal force is

#F=mr omega^2#

The variation in centripetal force is

#DeltaF=mr(Delta omega)^2#

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

#=4*4*pi^2#

#=157.9N#