Which of the following statements best summarizes the law of conservation
of energy before and after a change in a system?
A. PE (initial) + KE (initial) = PE (final) + KE (final)
=
B. PE (initial) = KE (initial) and PE (final) = KE (final)
C. PE (initial) = PE (final) and KE (initial) = KE (final)
=
D. PE (initial) + PE (final) = KE (initial) + KE (final)