A Horizontal, 10-M Plank Weighs 100 N

question 19

Multiple Choice

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
• B)0.3 m
• C)0.5 m
• D)0.7 m
• E)0.9 m

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