Chapter 10, Problem 29P

(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 boll head is 15 mm across (Fig. 10–49), estimate the force applied near each of the six points by a socket wrench.