Crates A and B weigh 200 lb and 150 lb, respectively. They are connected together with a c...

Crates A and B weigh 200 lb and 150 lb, respectively. They are connected together with a cable and placed on the inclined plane. If the angle θ is gradually increased, determine θ when the crates begin to slide. The coefficients of static friction between the crates and the plane are µA = 0.25 and µB = 0.35.