PROBLEMS 



457 



Graphic ^Statics. 

 iA 



Problem ?2. 



Algebraic 

 Center of Moments, A. 

 l~Ex 15.9 + sooo 



R,L 3o'-o 1 ' 4 



t x 



2-YxiS.6-3000XIS0 



(b) 



4~ 



-EOOO X15 =0. 



-Y=+7600. 

 *- Cenicr of Moments. 



RjXso+aooo xi 5+ 2000x^0*3000x45 

 = o. (h) R 



