A model train, with a mass of #8 kg#, is moving on a circular track with a radius of #1 m#. If the train's rate of revolution changes from #3/5 Hz# to #5/4 Hz#, by how much will the centripetal force applied by the tracks change by?

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Answer 1 · 2017-02-24T13:41:23

The change in centripetal force is #=133.4N#

The centripetal force is

#F=mr omega^2#

The variation in centripetal force is

#DeltaF=mr(Delta omega)^2#

#=8*1*((5/4-3/5)2pi)^2#

#=8*13^2/100*pi^2#

#=133.4N#