49. A block (m1) with a weight of 10 kg was placed on a wooden bar with a weight of 2 kg. The left end of the bar was attached firmly to a triangle. How much force (F) does it take to keep the system in horizontal equilibrium? (Gravitational acceleration g = 10 m/s2 )

(A) 165 N
(B) 224 N
(C) 283 N
(D) 318 N
(E) 361 N
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統計: A(1), B(1), C(41), D(1), E(0) #2751664
統計: A(1), B(1), C(41), D(1), E(0) #2751664