A model train, with a mass of #4 kg#, is moving on a circular track with a radius of #3 m#. If the train's kinetic energy changes from #4 j# to #15 j#, by how much will the centripetal force applied by the tracks change by?
we know that the change in kinetic energy of the system
we also know that change in centripetal force is
centripetal force =
so we gonna substitute the values we get
we put this value in centripetal force change equation we get