[填空题]
The bolts on the cyliqrd6a p 8:dk0co40a2ip8vl q cae zg45i-5cyq nder head of an engine require tightening to a t; cq3 bjus:+uaktifb2*)zh .torque of 38q2tku t+fi.cu ;j3:)bszah *b $m \cdot N$ If a wrench is 28 cm long, what force perpendicular to the wrench must the mechanic exert at its end? N 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). N