(a) The smooth 180-lb pipe has a length of 20 ft and a negligible diameter. It is carried on a truck as shown. Determine the maximum acceleration which the truck can have without causing the normal reaction at A to be zero. Also determine the horizontal and vertical components of force which the truck exerts on the pipe at B.

(b) The acceleration is only one half of the answer in (a), Find the normal reaction at A, and the reaction components fix and By:

B, a BR 20 ft 180 lb 12 ft 5 ft