[填空题]
The bolts on the cyl gpc.eqdk 4j,pog6-t*inder head of an engine require tizay)0:rpqkwhti-y(wt q9h( w+: /qp v ;3kob lghtening to a torque of 38(pwqo/yb(y:+lh qtw ihq 3:;)t0vakz- kr w 9p $m \cdot N$ 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
