A model train, with a mass of #15 kg#, is moving on a circular track with a radius of #3 m#. If the train's rate of revolution changes from #2 Hz# to #1 Hz#, by how much will the centripetal force applied by the tracks change by?

1 Answer
Jun 27, 2017

Answer:

The centripetal force changes by #=1776.5N#

Explanation:

The centripetal force is

#F=mr omega^2#

The mass is #m=15kg#

The radius #r=3m#

The change in angular velocity is

#Delta omega=(2-1)*2pi=(2pi)rads^-1#

The variation in centripetal force is

#DeltaF=mr(Delta omega)^2#

#=15*3*(2pi)^2#

#=1776.5N#