The bolts on the cylinder head of an engine require tightening to a torque of 88m 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 in diameter, estimate the force applied near each of the six points by a socket wrench (Fig. 8-41).

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28 cm 15 mm on wrench on bolt