Sec. 8.28-2. If the coefficient of static friction between the incline and the 200-lb crate is μs = 0.3,determine the force P that must be applied to the rope to begin moving the crate up the incline.Problem 8-2

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Answered: Sec. 8.2 8-2. If the coefficient of…

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

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

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Chapter7: Dry Friction

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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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The leather rein used to fasten the horse to the hitching rail weighs 3.5 oz per foot. The coefficient of static friction between the rail and the rein is 0.6. If a 34-lb force acting on the bridle is sufficient to restrain the horse, determine the smallest safe length L for the free end of the rein.
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8-2. If the coefficient of static friction between the incline and the 200-lb crate is μ = 0.3, determine the force P that must be applied to the rope to begin moving the crate up the incline. Problem 8-2 30°
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Force P is applied to the end of a rope being used to hold the 50-lb block on the 20° incline. The coefficient of static friction between the block and the incline is u. = 0.30. Determine the largest value of P for which the block is in equilibrium and will not begin to move up the incline when 0 = 15°. Hs = 0.30 20° The solution to this problem requires a free-body diagram of the block, and a sketch of the coordinate system used. Use the components of the forces with EF = 0 and EF, = 0 to y apply ΣF=0.
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8: Calculate the horizontal force P on the light 10° wedge necessary to initiate movement of the 40-kg cylinder. The coefficient of static friction for both pairs of contacting surfaces is 0.25. Also determine the friction force fB at point B.Answer: P = 98.6 N; fB = 24.6 N
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