A Spring of Negligible Mass and with Spring Constant 200

A spring of negligible mass and with spring constant 200.0 N/m is compressed by 0.250 m.Then a steel ball bearing of mass 0.05 kg is put on the spring,and the spring is released.The spring and ball bearing are aligned horizontally and friction is negligible.In addition,assume that the ball bearing will come off the spring exactly as the spring returns to its equilibrium position.The speed of the ball bearing right after the ball bearing loses contact with the spring is

A) 12.9 m/s.
B) 14.2 m/s.
C) 15.8 m/s.
D) 11.3 m/s.
E) 17.6 m/s.

Correct Answer:

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