A Mass M₁ = 7

question 18

Multiple Choice

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 = 5.0 kg is moving to the left at v_O.The two masses then collide and stick together.If the maximum compression of the spring is 1.2 m,what was the initial velocity of the second mass (v_O) ?

• A)2.45 m/s
• B)3.68 m/s
• C)6.32 m/s
• D)8.00 m/s
• E)5.88 m/s

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