Questions 16-17: A block oscillates without friction on the end of a spring as shown. The minimum and maximum lengths of the spring as it oscillates are, respectively, xmin and xmax . The graphs below can represent quantities associated with the oscillation as functions of the length x of the spring.
(A)
(B)
(C)
(D)
16. Which graph can represent the total mechanical energy of the block-spring system as a function of x ?
(A) A
(B) B
(C) C
(D) D