HW15Sol - Jim Guinns PHYS1111 Assignment #15 Solutions Due...

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Jim Guinn’s PHYS1111 Assignment #15 Solutions Due Monday, Apr. 5, 2010 Consider a ladder of length 2.50m and mass 17.0kg , leaning against a vertical wall making an angle of θ with the floor. A firefighter with mass 80.0kg stands on the ladder a distance 2.25m from the end of the ladder on the floor. There is no friction between the ladder and the wall, and a coefficient of static friction of 0.250 between the ladder and the floor. 1. Name all of the forces acting on the ladder, give each direction, and determine where on the ladder each force acts. The forces with their directions are W L = weight of the ladder acting straight down at the center of the ladder W f = weight of firefighter acting straight down 2.25m from the end of the ladder on the ground N w = normal force from the wall acting to the left on the end of the ladder on the wall N g = normal force from the ground acting straight up on the end of the ladder on the ground f s = static friction acting to the right on the end of the ladder on the ground θ N W N g f s W L W f
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HW15Sol - Jim Guinns PHYS1111 Assignment #15 Solutions Due...

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