A uniform plank of length 4.3 m and weight 201 n rests, Ask an Expert

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Q. A uniform plank of length 4.3 m and weight 201 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support (see the drawing). To what distance x can a person who weighs 449 N walk on the overhanging part of the plank before it just begins to tip?

Q. Calculate the adiabatic exponent of mixture of two gasses and b. a and b have adiabatic exponent ya and yb respectively. and molar fraction fa and fb respectively.

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