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?

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Answer 1 · 2017-02-15T18:00:40

The change in centripetal force is #157.9N#

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#