M1. (A) (B) An object attached to a spring oscillates horizontally Without losing mechanical energy. The displacement vs. time graph for the object is shown. Which of the following correctly represents the kinetic energy vs. time graph for the same object over the same interval? K M3. When a mass hangs vertically, it stretches a spring a distance x and has a period T when set into oscillation. When on the incline shown, how do the new equilibrium stretch and oscillation period compare to x and T? Equilibrium Stretch Oscillation Period (A) Less than x Less than T (B) Less than x Equal to T (C) Equal to x Less than T (D) Equal to x Equal to T