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OpenStudy (anonymous):
A horizontal, 10-m plank weighs 100 N. It rests on two supports that are placed 1.0 m from each end as shown in the figure. How close to one end can an 800-N person stand without causing the plank to tip? (a) 0 m (d) 0.7 m (b) 0.3 m (e) 0.9 m (c) 0.5 m
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