A Block on a Frictionless, Horizontal Surface Is Attached to a Spring

Multiple Choice

A block on a frictionless, horizontal surface is attached to a spring that requires 125 N of force for the block to be stretched 15 cm away from equilibrium. From this position the block is released, and it begins to oscillate with a period of 0.25 s. What is the mass of the block?

A) 0.66 kg
B) 4.1 kg
C) 1.3 kg
D) 5.3 kg