A Mass M₁ = 7

A mass m₁ = 7.0 kg is at rest on a frictionless horizontal surface and connected to a wall by an ideal spring with a spring constant of k = 50 N/m as shown in the figure.A second mass m₂ = 7.0 kg is moving to the left at v_O.The two masses then collide elastically.If the maximum compression of the spring is 1.2 m,what was the initial velocity of the second mass (v_O) ?

A) 3.21 m/s
B) 2.45 m/s
C) 8.00 m/s
D) 5.88 m/s
E) 6.32 m/s

Correct Answer:

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