A mass, m1 = 9 kg, is at rest on a frictionless horizontal surface and connected to a wall by a spring with k = 67 N/m, as shown in the figure. A second mass, m2 = 6 kg, is moving to the right at v0 = 16 m/s. The two masses collide and stick together.
(a) What is the maximum compression of the spring?

(b) How long (how much time) will it take after the collision to reach this maximum compression?


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