COXSTKAlNEf) BO: - ", 



8<v 1< tcnninatenaM which ocean M to the Talon 



m> I / been expected; for if two forte*, 



'he *mt ttr 



ill IKJ the tame at whatever point in 

 i we suppose them Applied, and oonieqii 

 inay be supposed both to act at the tame point, or one 

 reated provided the other be equally di- 

 1 objected that in any exp 



there really would be some dtjimte pressure at each fixed 



ply, that no body on which we can ex- 



ill the comli xrfsct npiV%, on which 



usions depend. See /bi*i, Art 270; and 

 Arts. 128133. 



ease which we hare been considering is that of a bodr 



! a/zttt/oxu; for an axis 

 will be fixed if two of its points are fixed. 



89. ifttead of having two fixed points, can 

 I an axis and also tlieU ofay it, then in a>: 



the c- Y=0, we most have /T0, supposing the axis 



of s directed along the straight line on which the body can 

 turn -he axis will not be able, as in the last 



case, to furnish any forces Z and Z* to counteract j?, and 

 muBt-0. 



90. To nml the condition* of equilibrium of a nyiW body 

 rating on a smooth plane. 



\ this plane be the plane of (x, y); and let r. y' be the 

 co-ordinates of one of the points of contact, 1C the puissmu 

 which the body exerts against the plane at that point Then 

 tip- : '/', and similar forces for the other points of 



conta connexion with the given forces, ought to 



satisfy the equations of equilibrium; hence 



'. y M. / i: i: _ . 0| 



jr_7?'y-7ry'-...-o, M+KX+R-X* 4-...-0, .v-o. 



point be in contact with the plane, then 

 i gives the pressure, and we have five equations 

 of condition, 



