A massless, rigid board is placed across two bathroom scales thatare separated b

Question

A massless, rigid board is placed across two bathroom scales thatare separated by a distance of 2.00 m. A person lies on the board.The scale under his head reads 455 N, andthe scale under his feet reads 325 N.
(a) Find the weight of the person.
??N

(b) Determine the distance between the person's head and his centerof gravity.
??m Just needed some help thanks! (a) Find the weight of the person.
??N

(b) Determine the distance between the person's head and his centerof gravity.
??m Just needed some help thanks!

Explanation / Answer

The weight of the person is just the sum of the scalereadings .      455 + 325  =    780 N   is his weight .     To get the distance from his head to thecm, assume the cm is at zero. Then for the scales to balance, youmust have .          reading ofhead scale * distance from head to cm = reading of footscale * distance from foot to cm . or             455 *   x    =     325 * ( 2.00 - x) .    solve      x =   0.8333 meters    is the distance from his headto his cm

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