ENERGY AND ITS TRANSFORM Al^IONS. 1 3 



the Statical measure of the effort, and the weight 



of the body, we have 



F:Wv.f'.g\ t:i::v,-v,:f\ 



g 



V, and being the initial and final velocities, and t the 

 time of action of the accelerating force. 

 For variable acceleration, 



/=S= 



F=-,yj. ..... (7) 



The space, s, is equal to A and the wo?'k done 



is, for uniform acceleration, 



t 2 g 



--,2 ^,2 



= ^^^^zlii (8) 



For variable acceleration, 



U=^d{Fs)^ W.d.— =^W — . . . (9) 



