Answer to Question #148461 in Classical Mechanics for Robert Royea

Question

if a beam is12"x12"x 23' long and weighs 3289lbs. 143bs per foot. how much weight is applied if the beam was to be lifted straight up from one end

Answer 1

$$W\frac{L}{2}=FL\\F=\frac{W}{2}=\frac{3289}{2}=1644.5\ lb_s$$