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Q1. What is the theoretical maximum amount of ice that the freezer might make per hour, starting with water at 20 ?C?

Q2. A 28-N crate is suspended from the left end of a plank. The plank weighs 21 N, but it is not uniform, so its center of gravity does not lie halfway between the two ends. The system is balanced by a support that is 0.30 m from the left end of the plank. How far to the right of support is the plank's center of gravity?

Q3. A father (m = 90 kg) and son (m = 45 kg) are standing facing each other on a frozen pond. The son pushes on the father and finds himself moving backward at 3 m/s after they have separated. How fast is the father moving?

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