point(s) possible an automobile safety test, a shoulder and seat belt exerts a force of 86.0 lb directly backward and a force of 76.0 lb ckward at an angle of 20 below the horizontal on a dummy. If the belt holds the dummy from moving farther forward, what ce did the dummy exert on the belt? 86.0 1b 20 76.0 1b . . . t up the problem by representing each force as a vector, using an angle given from standard position. Let A represent the 86.0 lb force, and let B represent the 76 force Vector Magnitude Standard-position Angle A Ib B 1b he dummy exerted a force of Ib, at an angle of the horizontal. Round to one decimal place as needed.)