Which of the following is true of the conservation of energy in a closed system?

Question

a. kinetic energy is always conserved

b. mechanical energy is always conserved

c. gravitational potential energy is always conserved

d. elastic potential energy is always conserved

e. none of these are conserved in a closed system

Answer 1

ENERGY is conserved in a closed system but one form of energy is not necessarily conserved because energy can change forms. Example: A ball on a hill could have 100% potential energy instantaneously before it rolls down the hill converting all the potential energy into kinetic energy. So the answer is e (although it is not worded very well.