ME A 7.-, 



axes of x t y, f rrnpr. rejoltant 



>, jr, ) from the origin, 

 angle between r aim /'; thru 



-/r f ( - 



; M^ 



//- 



. 



. as we ii re anticipated, // 



it s. v. ). and a force at the 



and acting in a parallel and opposite direc- 



EeAOQ '< IB the couple formed bj compooodittf the 



14ng from all the force* t>: 



an example of Art. 73 we may take the emae in 

 tralUL Let a, 0, y he the angle* 

 force* /' .. makea with the 



axes. linn the equations of equilibrium reduce to 



-0 



cot? - * coe/8) - 0, 

 /'( cos a x cos7)iO > 

 ^^(x co- y cos a)- 0. 



us may be written thus: 



^Sft i 

 2 coap ooe7* 



a we can deduce * tliat a *\*lcm of naralltl 



force.- ^in a bo*ly in fjuililniuin, MIMMT iMy aMy 



'"I/H)M/ //' 



2, , 7 may be. That we 



must have 



/'x-o, />-< *o. 



