224 



Elementary Principles of A nimal Mechanics. [Mar. 1 1 , 



This curve is shown in the figure, and represents the relation be- 

 tween w and t within the limits. The ordinate w reaches a maximum, 

 within these limits when — 



dw q 



dr 



which gives us 



w=10 17 lbs. 

 t= -932 second. 



