Question

A uniform ladder is 10 m long and weighs 400 N. It rests with its upper end against a frictionless vertical wall. Its lower end rests on the ground and is prevented from slipping by a peg driven into the ground. The ladder makes a 30°angle with the horizontal. The force exerted on the wall by the ladder is:

A) 47 N
B) 74 N
C) 120 N
D) 350 N
E) 460 N

Answer

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