To mark the positions of the rails on the posts of a fence, a home-owner ties a

Question:

To mark the positions of the rails on the posts of a fence, a home-owner ties a cord to the post at A, passes the cord over a short piece of pipe attached to the post at B, and ties the free end of the cord to a bucket filled with bricks having a total weight of 60 lb. Knowing that the weight per unit length of the cord is 0.02 lb/ft and assuming that A and B are at the same elevation, determine

(a) The sag h,

(b) The slope of the cord at B. Neglect the effect of friction.

150 ft