[填空题]
A person exerts a force ok, o7uq,9oe ejf 55 N on the end of a door 74 cm wide. What 9ba2nw3h1 pbp4 tpnfsg,.9 xo is the magnitude of the tor,a s9wbp3.x fn1hg2ton 4pp9 bque 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
