At the local playground, a 21-kg child sits on the right end of a horizontal teeter-totter, 1.8
Question:
At the local playground, a 21-kg child sits on the right end of a horizontal teeter-totter, 1.8 m from the pivot point. On the left side of the pivot an adult pushes straight down on the teeter-totter with a force of 151 N. In which direction (clockwise or counterclockwise) does the teeter-totter rotate if the adult applies the force at a distance of
(a) 3.0 m,
(b) 2.5 m,
(c) 2.0 m from the pivot?
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