A model train, with a mass of #4 kg#, is moving on a circular track with a radius of #7 m#. If the train's rate of revolution changes from #1/6 Hz# to #1/2 Hz#, by how much will the centripetal force applied by the tracks change by?

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Answer 1 · 2017-02-16T14:57:57

The centripetal force is #=122.8N#

The centripetal force is

#F=mr omega^2#

The variation in centripetal force is

#DeltaF=mr(Delta omega)^2#

#=4*7*((1/2-1/6)2pi)^2#

#=28*4/3^2*pi^2#

#=122.8N#