A uniform plank of length 6m and weight 211n rests, Ask an Expert

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Q. A uniform plank of length 6m and weight 211N rests horizontally on two supports, with 1.1 m of the plank hanging over right support. To what distance x can a person who weighs 442N walk on the overhanging part of the plank before it just begins to tip?

Q. Our Sun rotates about the center of Galaxy (MG 4. 1041 kg) at a distance of about 3. 104 light-years (1 ly = 3. 108 multiplied by 3.15 107 s/y multiplied by 1 y). What is the period of our orbital motion about the center of Galaxy?

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