29 (II) The bolts on the cylinder head of an engine require tightening to a torque of 75 m N. If a wrench is 28 cm long, what force perpendicular to the wrench must the mechanic exert at its end? If the six-sided bolt head is 15 mm across (Fig. 10-49), estimate the force applied near each of the six points by a socket wrench. 15 mm 28 cm F on bolt FIGURE 10-49 Problem 29. F on wrench