[填空题]
A person exerts a forcezkxq7-rq+y.azn mj*, of 55 N on the end of a door 74 cm wide. What is the magrnjq*amzq7- . k+yz, xtzad9 trd5n 9;nitude of t9rd;ta59tn dzhe torque 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? $m \cdot N$
Post time 2025-2-18 20:00:22
