Answered: uniform ladder stands on a rough floor…

Physics for Scientists and Engineers

10th Edition

ISBN:9781337553278

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter12: Static Equilibrium And Elasticity

Section: Chapter Questions

Problem 6P: A uniform beam of length 7.60 m and weight 4.50 102 N is carried by two workers, Sam and Joe, as...

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A uniform ladder stands on a rough floor and rests against a frictionless wall as shown in the figure.

Since the floor is rough, it exerts both a normal force N₁ and a frictional force f₁ on the ladder. However, since the wall is frictionless, it exerts only a normal force N₂ on the ladder. The ladder has a length of L = 4.4 m, a weight of W_L = 53.5 N, and rests against the wall a distance d = 3.75 m above the floor. If a person with a mass of m = 90kg is standing on the ladder, determine the following.

(a) the forces exerted on the ladder when the person is halfway up the ladder (Enter the magnitude only.)

N₁ =	? N
N₂ =	? N
f₁ =	? N

(b) the forces exerted on the ladder when the person is three-fourths of the way up the ladder (Enter the magnitude only.)

N₁ =	? N
N₂ =	? N
f₁ =	? N

A uniform ladder stands on a rough floor and rests against a frictionless wall as shown in the figure.
y
N₁
b
mg
N₂

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