A uniform ladder is 10m long and weighs 400 N. It rests with its upper end again

Question

A uniform ladder is 10m 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 magnitude of the

force exerted on the peg by the ladder is:

A. zero

B. 200N

C. 400N

D. 470N

E. 670N

ans: D

A uniform ladder is 10m 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 magnitude of the force exerted on the peg by the ladder is: zero 200N 400N 470N 670N

Explanation / Answer

A uniform ladder is 10m long and weighs 400 N. It rests with its upper end again

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