raonr< 



Itt 



It is v 



aii-l ODtt* 



h .!. 



not write down the equation* of equilibrium <>\ 

 >bstacle, because v, >w the force it at 



it rent*. 



1 to resolve A' which acts on the wedge 



NO components; one along the straight line in 

 n contact with the wedge, 

 wedge were pushed further ii: f 



t angles to this direction. Let 

 othefirnt d: 



solved part of /.' in t : ion is R cos i", 



i we will call 



fore 



_ fm i 



is known about the value of the angle t', 

 ctical vzi! 



Screw. This 





.. : 

 result is of i' 



169. The last Mechanical Pow 

 H simple construction 

 consists of a AB with a 



tread abed... 

 traced roi 



a con :le with lines 



parallel to the axis of 



j into a bio 



(1 with Irical 



aperture, on re of 



t a groove the exact 



;ig thread 



wen from t 



that when the cylinder is introduced into the block, 

 move is backwards or for- 



wards by revolving about its axis, the thread sliding in the 

 groove. Suppose If to In- g on the cylinder, 



weight of the cylinder itself, and P to ! 

 powe: ic end of an arm JC at right angles to the 



axis supposed to be firmly 



fixed, and the axis of the cylinder to be vertical. 



. To find the ratio oftbepover and weight in the Scrtw 

 1 when they are in equilibrium. 



T.8. 13 



