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

$DeltaF=mr(Delta omega)^2$

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

$=4*4*pi^2$

$=157.9N$

A model train, with a mass of 1 kg1 kg, is moving on a circular track with a radius of 4 m4 m. If the train's rate of revolution changes from 1 Hz1 Hz to 2 Hz2 Hz, by how much will the centripetal force applied by the tracks change by?