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5. (5 points) The two boxes are sliding along a frictionless surface. They collide and stick together. Afterward, the velocity of the two boxes is 4 m/s 2 m/s 2 kg 1 kg a) 2 m/s to the left b) m/s to the left c) 0 m/s, at rest d) 1 m/s to the right e) 2 m/s to the right 6. (5 points) Rank in order, from largest to smallest, the gravitational potential energies of the balls. V-0 4 a) 1>2-4>3 b 1>2>34 c) 3>2>4>1 d) 3>2-4
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