Frition8–5. The ladder has a uniform weight of 80 lb and restsagainst the smooth wall at B. If the coefficient of staticfriction at A is HA = 0.4, determine if the ladder will slip.ВTake 0 = 60°.8–6. The ladder has a uniform weight of 80 lb and restsagainst the wall at B. If the coefficient of static friction at Aand B is µ = 0.4, determine the smallest angle 0 at whichthe ladder will not slip.15 ft(8.5 not slip, 8.6 0 = 46.4) (g = 32.2)AO O O O

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8–5. The ladder has a uniform weight of 80 lb and rests against the smooth wall at B. If the coefficient of static friction at A is µs = 0.4, determine if the ladder will slip. Take 0 = 60°. %3D

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.4P: The two homogeneous bars AB and BC are connected with a pin at B and placed between rough vertical...

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Question

Frition
8–5. The ladder has a uniform weight of 80 lb and rests
against the smooth wall at B. If the coefficient of static
friction at A is HA = 0.4, determine if the ladder will slip.
В
Take 0 = 60°.
8–6. The ladder has a uniform weight of 80 lb and rests
against the wall at B. If the coefficient of static friction at A
and B is µ = 0.4, determine the smallest angle 0 at which
the ladder will not slip.
15 ft
(8.5 not slip, 8.6 0 = 46.4) (g = 32.2)
A
O O O O

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