ANSWERS, 



Page 101. 



183 



(i) The horizontal and vertical components of the reaction at C 



are C x = -- W, C y = ^^^ W t where h is the perpendicular dis- 

 a -\- b a -{- b 



tance of C from AB, and a, b are the segments into which this 

 perpendicular divides AB. 



Pages 112-113. 



CO 60 



jP<2 JFsintf; (0 if Pact up the plane, J p= sm > + jp. if /> act 



cos < 



down the plane, />= sm (*-0) ^ 

 cos</> 



(2) 3 tons. 



cos(^-a) 



( 4 ) W/ > = ^(/-<^) W . 



cos( + ^>) 



(5) ^ = ^-2^. 



<> - 



Pages 145-146. 



<3) (*) 75; W 3 l6 425ooo. (5) 150 ft.-pounds. 



(4) 1 8 ooo ft.-pounds. 



Page 164. 



(2) The centre of the inscribed circle. 

 / \ a b 



