A model train, with a mass of #4 kg#, is moving on a circular track with a radius of #15 m#. If the train's kinetic energy changes from #32 j# to #24 j#, by how much will the centripetal force applied by the tracks change by?
2 Answers
The change in centripetal force is
Explanation:
The centripetal force is
The kinetic energy is
The variation of kinetic energy is
The radius is
The variation of centripetal force is
Explanation:
where
Thus,
Note:
Negative sign signifies the centripetal force decreases