The total mechanical energy of a system
A. is equally divided between kinetic energy and potential energy.
B. is either all kinetic energy or all potential energy, at any one instant.
C. can never be negative.
D. is constant, only if conservative forces act.
Answer:D
The total mechanical energy of a system
A. is equally divided between kinetic energy and potential energy. B. is either all kinetic energy or all potential energy, at any one instant. C. can never be negative. D. is constant, only if conservative forces act.