3. Use vectors and vector operations to compute the physical quantities below. (a) When Oscar moves a box, he applies a force with magnitude 50 lbs. at an angle 0 = 20 below the horizontal as shown. He is able to move the box 8 ft. along the oor. Compute the work done. (b)To tighten a bolt, Oscar applies a force of 15 lbs at an an 1e of 0 = 40 below the horizontal. He applies this force r = 9 inches from t e center of the bolt. Determine the magnltude and direction of the torque. lrl - a -* Gm? of Action \\___ ___ an gen 0