A model train, with a mass of #3 kg#, is moving on a circular track with a radius of #4 m#. If the train's rate of revolution changes from #3 Hz# to #2 Hz#, by how much will the centripetal force applied by the tracks change by?

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Answer 1 · 2017-02-10T08:00:40

The answer is #=473.7N#

The centipetal force is

#F=mr omega^2#

#m=# mass

#r=# radius

The variation in centripetal force is

#Delta F=mr (Delta omega)^2#

#Delta omega =(3-2)*2pi rads^-1#

#Delta F=3*4*(2pi)^2=473.7N#