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Q1. A block with mass m = 12.90 kg slides down an inclined plane of slope angle 13.1 with a constant velocity. It is afterwards projected up the same plane with an initial speed 1.25 m/s. How far up the incline will the block move before coming to rest?

Q2. A father (m = 65 kg) and son (m = 38 kg) are standing facing each other on a frozen pond. The son pushes on the father and finds himself moving backward at 3.0 m/s after they have separated. How fast would the father be moving?

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