Sir Lancelot climbs a ladder. The ladder has total length I and mass m₁, and makes an angle with the horizontal. There is no friction between the ladder and the wall; between the ladder and the ground there is static friction with static friction coefficient μg. Sir Lancelot has mass ms = 5 my: the acceleration of gravity is g. The ladder has 10 rungs with mutual distance L/10; the bottom rung is on distance L/20 from the bottom. See right figure. When Sir Lancelot is positioned on rung n (with n <10), the situation is still stable. When he steps on rung n+ 1 the ladder slips and he falls to the ground. Calculate the minimum value μs,min and the maximum value μs,max of the static friction coefficient (so, μs,min Hs
Sir Lancelot climbs a ladder. The ladder has total length I and mass m₁, and makes an angle with the horizontal. There is no friction between the ladder and the wall; between the ladder and the ground there is static friction with static friction coefficient μg. Sir Lancelot has mass ms = 5 my: the acceleration of gravity is g. The ladder has 10 rungs with mutual distance L/10; the bottom rung is on distance L/20 from the bottom. See right figure. When Sir Lancelot is positioned on rung n (with n <10), the situation is still stable. When he steps on rung n+ 1 the ladder slips and he falls to the ground. Calculate the minimum value μs,min and the maximum value μs,max of the static friction coefficient (so, μs,min Hs
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 7.50P: The block of weight W is pulled by the force P inclined at the angle to the horizontal. Find the...
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