A model train, with a mass of #8 kg#, is moving on a circular track with a radius of #1 m#. If the train's rate of revolution changes from #5/8 Hz# to #5/4 Hz#, by how much will the centripetal force applied by the tracks change by?
The centripetal force of an object is given by
You can also find
Substitute this into the above equation,
or, since we're looking at the change in centripetal force from the change in frequency, then
Therefore, using the values that we know,