Question
A uniform stationary ladder of length= 5.1 m and mass= 15 kg leans against a smooth vertical wall, while its bottom legs rest on a rough horizontal floor. The coefficient of static friction between floor and ladder is μ = 0.41. The ladder makes an angle θ = 51° with respect to the floor. A painter of weight 8M stands on the ladder a distance d from its base.
1)Which is the expression for the magnitude of the normal force NW exerted by the wall on the ladder?
A)NW = 1/2Mg cotθ (1+16d/L)
B)NW = ½Mg cotθ
C)NW = 1/2Mg cotθ (16d/L)
D)NW = 1/2Mg tanθ (1+16d/L)
E)NW = Mg cotθ (16+d/2L)
2)What is the largest value of dmax for which the ladder does not slip, in meters?
1)Which is the expression for the magnitude of the normal force NW exerted by the wall on the ladder?
A)NW = 1/2Mg cotθ (1+16d/L)
B)NW = ½Mg cotθ
C)NW = 1/2Mg cotθ (16d/L)
D)NW = 1/2Mg tanθ (1+16d/L)
E)NW = Mg cotθ (16+d/2L)
2)What is the largest value of dmax for which the ladder does not slip, in meters?
Answers
a!!! It's A!
12
Related Questions
A uniform ladder of length L and mass m leans against a frictionless vertical wall, making an angle...
In the figure, a uniform ladder of weight 200 N and length 10 m leans against a perfectly smooth wal...
A uniform ladder AB of length 6m and mass 40kg rests in a vertical plane with his end B on smooth ho...