‘Unlike most of the other muscles in our bodies, the masseter muscle in the jaw, as illustrated in Figure 9.44, is attached relatively far from the joint, enabling large forces to be exerted by the back teeth. (a) Using the information in the figure, calculate the force exerted by the lower teeth on the bullet. (b) Calculate the force on the joint.
Solution 35PE Step-by-step solution Step 1 of 3 (a) Refer to the figure 9.44 provided in the text book. Draw the free body of diagram as given below, Step 2 of 3 Calculate the force exerted by the teeth on the bullet by equating torque around pivot point A , Substitute 200 N for solve for , Hence, Force exerted by the teeth on the bullet is in upward direction.