[填空题]
A person exerts a force ofv88z l khw b5xjq4ai*0n wk /(g:2wduh55 N on the end of a door 74 cm wide. What is the magnitude of the torq(2 /h wwg:nukdue if the force is exerted (a) perpendicular to the door $m \cdot N$ (b) at a 45 $^{\circ} $ angle to the face of the door? $m \cdot N$