A uniform plank of length 5.5 m and weight 205 n rests, Ask an Expert

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Q. A uniform plank of length 5.5 m and weight 205 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support .To what distance x can a person who weighs 447-N walk on the overhanging part of the plank before it just begins to tip?

Q. A tsunami of wavelength 250 and velocity 570 travels across the Pacific Ocean. As it approaches Hawaii, people observe an unusual reduce of sea level in the harbors. Just about how much time do they have to run to safety?

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