A model train, with a mass of #24 kg#, is moving on a circular track with a radius of #3 m#. If the train's kinetic energy changes from #18 j# to #21 j#, by how much will the centripetal force applied by the tracks change by?
Mass of the train m= 24kg
The radius of circular path (r)=3m
Change in KE =
Dividing both sides of this equation by radius (r)of circular path and multiplying both sides by 2 we have
We see that left side of the equation is the change in centripetal force
So The change in centripetal force is