Page 3 > of 5 5. At what acute angle from the horizontal did a boy pull a dog in a wagon if he expended 2650 ft-lbs of energy exerting a constant force of 38.5 lbs on the wagon throughout the entire distance of 118 ft? 6. The tension force F on a chain necessary to keep a 4650-lb truck from rolling down the incline is 1845 lbs. What is a). the angle of elevation of the ramp (i.e., find 0 in degrees), and what is b). the normal force of the truck on the ramp? F N