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 expressions gives the displacement of the block as a function of time? Let x be in cm and t in seconds.

A) x = 15 cos(14 $\pi$ t)
B) x = 15 sin(14 $\pi$ t)
C) x = 7 cos(15 $\pi$ t)
D) x = 14 sin(15 $\pi$ t)
E) x = 44 cos(14 $\pi$ t)