일반물리학 1 · Rotation · Problem 47
일반물리학 1 — Rotation: Problem 47
47 A 60 kg father and 20 kg child sit on opposite ends of a seesaw consisting of a board of length 4.0 m and negligible mass. The pivot can be placed anywhere between the father and the child. At what distance from the child should it be placed so that the seesaw is balanced when the father and child are stationary?
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