the masses of the pulley and cord. FIGURE 4–45 Problems 51, 52, and 53. Mass m, rests on a smooth horizontal surface, må hangs vertically. mg . (II) (a) If ma = 13.0 kg and mg = 5.0 kg in Fig. 4–45, determine the acceleration of each block. (b) If initially ma is at rest 1.250 m from the edge of the table, how long does it take to reach the edge of the table if the system is allowed to move freely? (c) If må = 1.0 kg, how large must m, be if the acceleration of the system is to be kept at 10 8?

37. QIC (a) An elevator of mass m moving upward has two forces acting on it: the upward force of tension in the cable and the downward force due to gravity. When the elevator is

F4-25. Replace the loading system by an equivalent resultant force and couple moment acting at point A. 100 Ib - 200 Ib 3n 3t 150 lb Prob. F4-25

5. Find the forces F, and F, on the tooth in Fig. 5-12. (In orthodontics, forces applied to the teeth lead to forces on the supporting bones. Gradually the bone tissue breaks down and permiis the tooth to rotate or translate. New bone tissue grows in the space left behind. The forces must be small enough to avoid damaging the root of the tooth.) F = 0.5 N 0.01 m F, 0.02 m F, Fig. 5-12