A model train, with a mass of $12 kg$ , is moving on a circular track with a radius of $3 m$ . If the train's rate of revolution changes from $7 Hz$ to $3 Hz$ , by how much will the centripetal force applied by the tracks change by?

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Answer 1 · 2017-02-13T07:06:28

The change in centripetal force is $=22739.6N$

The centripetal force is

$F=mr omega^2$

The variation in centripetal force is

$DeltaF=mr(Delta omega)^2$

$=12*3*((7-3)2pi)^2$

$=36*64*pi^2$

$=22739.6N$

A model train, with a mass of 12 kg12 kg, is moving on a circular track with a radius of 3 m3 m. If the train's rate of revolution changes from 7 Hz7 Hz to 3 Hz3 Hz, by how much will the centripetal force applied by the tracks change by?