To mark the positions of the rails on the posts of a fence, a homeowner ties a

Question:

To mark the positions of the rails on the posts of a fence, a homeowner 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 mass of 20 kg. Knowing that the mass per unit length of the rope is 0.02 kg/m and assuming that A and B are at the same elevation, determine

(a) The sag h,

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