The diagram shows a roller-coaster track. Assume that the system is closed. At point E, the roller-coaster car has just exited the vertical loop.
B
D
E
A
Which statement best describes the relative amounts of potential and kinetic
energy of a roller-coaster car at point E?
A. Kinetic energy is at almost 0%, and potential energy is at almost
100%
B. Both kinetic and potential energy are at almost 0%.
C. Potential energy is at almost 0%, and kinetic energy is at almost
100%
D. Both kinetic and potential energy are at almost 100%.