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1. On a laboratory air table, a puck moving due north at 3.5 m/s collides with an iddentical puck moving at 2.0 m/s, 45 degrees S of W. The first puck moves off at 2.5 m/s, 60 degrees N of W. What is the speed and direction of the second puck after the collinsion?

2. a 3000_kg truck moving north at 15 m/s north collides wiht a 1300-kg car moving west at 36 m/s. If the wreckages move away together, what is the velocity (speed and direction)?

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