A model train, with a mass of #1 kg#, is moving on a circular track with a radius of #4 m#. If the train's rate of revolution changes from #1 Hz# to #2 Hz#, by how much will the centripetal force applied by the tracks change by?

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Answer 1 · 2017-02-21T13:12:21

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#

#=1*4*((2-1)2pi)^2#

#=4*4*pi^2#

#=157.9N#