In preparation for shooting a ball (mass = 0.05 kg) in a pinball machine, a spring (k = 550 N/m) is compressed by 0.06 m horizontally relative to its unstrained length, with the ball initially at rest in contact with the spring. Assuming that the ball slides along a horizontal, frictionless surface, what the speed of the ball after the spring is released?
a) 40 m/s
b) 9.5 m/s
c) 6.3 m/s
d) 3.2 m/s
e) Not enough information is given