A child weighing 300 N sits 1 m from the pivot of a seesaw. At what distance must an adult weighing 200 N sit on the other side to balance it?
Answer and explanation
Correct answer: D. 1.5 m
- Step 1: Balance requires equal moments: 300 x 1 = 200 x d. Step 2. d = 300 / 200 = 1.5 m. Answer: 1.5 m. Why not the others: 0.67 m inverts the ratio.
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