[填空题]
The bolts on the cylinder head of an xf vpipj; *-,yengine/;qudb8 w)-j eh 6i+qefofd 2q require tightening to a torque of 38 efuq6;b hq+e/fq wd-)jd io82$m \cdot N$ 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
