A model train, with a mass of $4 kg$ , is moving on a circular track with a radius of $7 m$ . If the train's rate of revolution changes from $1/6 Hz$ to $1/2 Hz$ , by how much will the centripetal force applied by the tracks change by?

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Answer 1 · 2017-02-16T14:57:57

The centripetal force is $=122.8N$

The centripetal force is

$F=mr omega^2$

The variation in centripetal force is

$DeltaF=mr(Delta omega)^2$

$=4*7*((1/2-1/6)2pi)^2$

$=28*4/3^2*pi^2$

$=122.8N$

A model train, with a mass of 4 kg4 kg, is moving on a circular track with a radius of 7 m7 m. If the train's rate of revolution changes from 1/6 Hz1/6 Hz to 1/2 Hz1/2 Hz, by how much will the centripetal force applied by the tracks change by?