A uniform ladder 15 feet long is leaning against a frictionless wall at an angle of...
A uniform ladder 15 feet long is leaning against a frictionless wall at an angle of 53 degrees above the horizontal. The weight of the ladder is 30 pounds. A 75-pound boy climbs 6.0 feet up the ladder. What is the magnitude of the friction force exerted on the ladder by the floor? I have that the answer is 34. I'm just wondering why the x-components of the weights don't contribute to the net force in the x. many thanks. ΣMf = 0 0 = 75(6 cos53) + 30(7.5 cos 53) - n (15sin 53) n = 33.91 lb Also, ΣFx = 0 0 = n - f f = n f = 33.91 lb
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A uniform ladder 15 feet long is leaning against a frictionless
wall at an angle of...
1. A ladder 26 feet long is leaning against the wall of a building. The ladder...
1. A ladder 26 feet long is leaning against the wall of a
building. The ladder is pulled away from
the base of the wall at the rate of 3.5 feet per second.
a) How fast is the top moving down the wall when the base of the
ladder is 10 feet from the wall?
b) Find the rate at which the angle between the ladder and the wall
of the building is changing when the
base of the ladder...
A 16.0-m uniform ladder weighing 400 N rests against a frictionless wall. The ladder makes an...
A 16.0-m uniform ladder weighing 400 N rests against a frictionless wall. The ladder makes an angle of 60.0 degree angle with the horizontal. A 700-N firefighter climbs 5.00 m up the ladder, Draw a free-body diagram for the ladder. Find the force exerted by the wall on the ladder If the ladder is just on the verge of slipping when the firefighter is 10.00m up, what is the coefficient of static friction between ladder and ground?
A uniform ladder stands on a rough floor and rests against a frictionless wall as shown...
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 N, and a frictional force f on the ladder. However, since the wall is frictionless, it exerts only a normal force N, on the ladder. The ladder has a length of L = 4.65 m, a weight of W = 50.5 N, and rests against the wall a distance d...
A uniform ladder stands on a rough floor and rests against a frictionless wall as shown...
A uniform ladder stands on a rough floor and rests against a frictionless wall as shown in the figure. N2 mg d N. Since the floor is rough, it exerts both a normal force N, and a frictional force f, on the ladder. However, since the wall is frictionless, it exerts only a normal force N, on the ladder. The ladder has a length of L wall a distance d 3.75 m above the floor. If a person with a...
A uniform ladder stands on a rough floor and rests against a frictionless wall as shown...
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 n, and a frictional force r, on the ladder. However, since the wall is frictionless, it exerts only a normal force N, on the ladder. The ladder has a length of L = 4.3 m, a weight of w. = 67.5 N, and rests against the wall a distance d...
A uniform ladder stands on a rough floor and rests against a frictionless wall as shown...
A uniform ladder stands on a rough floor and rests against a frictionless wall as shown in the figure mg N1 Since the floor is rough, it exerts both a normal force N and a frictional force f, 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-4.5 m, a weight of wL-68.0 N, and rests against the wall a distance d 3.75 m...
(2-3) A 3.0 m long ladder leans against a frictionless wall at an angle of 60°...
(2-3) A 3.0 m long ladder leans against a frictionless wall at an angle of 60° as shown. Assume the ladder is uniform with its center of mass at its geometrical center and that it is in equilibrium. 2. Which forces cancel/force cancels the weight of the ladder? a. The normal force exerted on the ladder by the floor. b. Both the normal force exerted on the ladder by the floor, and the frictional force exerted on the ladder by...
A uniform ladder 5.0 m long rests against a frictionless, vertical wall with its lower end...
A uniform ladder 5.0 m long rests against a frictionless, vertical wall with its lower end 3.0 m from the wall. The ladder weighs 160 N. The coefficient of static friction between the foot of the ladder and the ground is 0.40. A man weighing 740 N climbs slowly up the ladder. What is the maximum frictional force that the ground can exert on the ladder at its lower end? What is the actual frictional force when the man has...
A uniform ladder stands on a rough floor and rests against a frictionless wall as shown...
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 = 4.85 m,
a weight of
WL = 62.5 N,
and rests against the wall a distance
d...
A uniform ladder 12 meters long rests against a vertical frictionless wall, as shown in the...
A uniform ladder 12 meters long rests against a vertical frictionless wall, as shown in the figure. The ladder weighs 400 N and makes an angle θ = 51° with the floor. A man weighing 874 N climbs slowly up the ladder. When he is 78 m from the bottom of the ladder, it just starts to slip. What is the coefficient of static friction between the floor and the ladder? 7.8 m
1. A ladder 26 feet long is leaning against the wall of a
building. The ladder is pulled away from
the base of the wall at the rate of 3.5 feet per second.
a) How fast is the top moving down the wall when the base of the
ladder is 10 feet from the wall?
b) Find the rate at which the angle between the ladder and the wall
of the building is changing when the
base of the ladder...
A 16.0-m uniform ladder weighing 400 N rests against a frictionless wall. The ladder makes an angle of 60.0 degree angle with the horizontal. A 700-N firefighter climbs 5.00 m up the ladder, Draw a free-body diagram for the ladder. Find the force exerted by the wall on the ladder If the ladder is just on the verge of slipping when the firefighter is 10.00m up, what is the coefficient of static friction between ladder and ground?
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 N, and a frictional force f on the ladder. However, since the wall is frictionless, it exerts only a normal force N, on the ladder. The ladder has a length of L = 4.65 m, a weight of W = 50.5 N, and rests against the wall a distance d...
A uniform ladder stands on a rough floor and rests against a frictionless wall as shown in the figure. N2 mg d N. Since the floor is rough, it exerts both a normal force N, and a frictional force f, on the ladder. However, since the wall is frictionless, it exerts only a normal force N, on the ladder. The ladder has a length of L wall a distance d 3.75 m above the floor. If a person with a...
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 n, and a frictional force r, on the ladder. However, since the wall is frictionless, it exerts only a normal force N, on the ladder. The ladder has a length of L = 4.3 m, a weight of w. = 67.5 N, and rests against the wall a distance d...
A uniform ladder stands on a rough floor and rests against a frictionless wall as shown in the figure mg N1 Since the floor is rough, it exerts both a normal force N and a frictional force f, 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-4.5 m, a weight of wL-68.0 N, and rests against the wall a distance d 3.75 m...
(2-3) A 3.0 m long ladder leans against a frictionless wall at an angle of 60° as shown. Assume the ladder is uniform with its center of mass at its geometrical center and that it is in equilibrium. 2. Which forces cancel/force cancels the weight of the ladder? a. The normal force exerted on the ladder by the floor. b. Both the normal force exerted on the ladder by the floor, and the frictional force exerted on the ladder by...
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 = 4.85 m,
a weight of
WL = 62.5 N,
and rests against the wall a distance
d...
A uniform ladder 12 meters long rests against a vertical frictionless wall, as shown in the figure. The ladder weighs 400 N and makes an angle θ = 51° with the floor. A man weighing 874 N climbs slowly up the ladder. When he is 78 m from the bottom of the ladder, it just starts to slip. What is the coefficient of static friction between the floor and the ladder? 7.8 m
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