When a 020-Kg Block Is Suspended from a Vertically Hanging Spring, It

Multiple Choice

When a 0.20-kg block is suspended from a vertically hanging spring, it stretches the spring from its original length of 0.040 m to 0.045 m. The same block is attached to the same spring and placed on a horizontal, frictionless surface as shown. The block is then pulled so that the spring stretches to a total length of 0.15 m. The block is released at time t = 0 s and undergoes simple harmonic motion.
-Which one of the following statements is true concerning the motion of the block?

A) Its acceleration is constant.
B) The period of its motion depends on its amplitude.
C) Its acceleration is greatest when the spring returns to the 5.0 cm position.
D) Its velocity is greatest when the mass has reached its maximum displacement.
E) Its acceleration is greatest when the mass has reached its maximum displacement.