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

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Answer 1 · 2017-02-15T18:00:40

The change in centripetal force is $157.9 N$ $157.9N$

The centripetal force is

$F = m r ω^{2}$ $F=mr omega^2$

The variation in centripetal force is

$DeltaF=mr(Delta omega)^2$

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

$=4*4*pi^2$

$=157.9N$

A model train, with a mass of 2 kg2kg2 kg, is moving on a circular track with a radius of 2 m2m2 m. If the train's rate of revolution changes from 2 Hz2Hz2 Hz to 3 Hz3Hz3 Hz, by how much will the centripetal force applied by the tracks change by?