P4-4. Determine the friction force at the surface of contact. 100 N W = 40 N %3D
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Q: (B) The 1400 kg coal car with load is being pulled by the weight E as shown in the figure. If the…
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A: Friction between ladder and B = 0.25 W = 100 N
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Q: (B) The 1400 kg coal car with load is being pulled by the weight E as shown in the figure. If the…
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- 4-79. The man has a mass of 40 kg. He plans to scale the vertical crevice using the method shown. If the coefficient of static friction between his shoes and the rock is u) = 0.4 and between his backside and the rock, = 0.3, determine the smallest horizontal force his body must exert on the rock in order to do this.3. Determine whether the 10 kg block shown is in equilibrium, and find the magnitude and direction of the friction force when P = 40 N and 0 = 20⁰. μ = 0.30 M = 0.25 20°The 2 kg ring is at the rest at point A as shown in the figure. If it is released through the circular rod what will be the highest amount of compression of the spring. Assume there is no friction. Consider the stiffness of the spring as k = 21 kN/m.
- The 3600-lb car with rear wheel drive is attempting to push the 4500-lb crate. The center of gravity of the car is at G, and the coefficients of static friction are 0.6 at B and 0.2 at C. Determine if the crate will slide. (The car pulling the crate is analyzed in Prob. 7.19.)The 1200-lb homogeneous block is placed on rollers and pushed up the 10 incline at constant speed. Determine the force P and the roller reactions at A and B.Determine the largest angle for which the homogeneous block remains at rest.
- Determine whether the block is in equilibrium and determine the value of friction forceThe three bars have a weight of WA = 20 lb, WB =40 lb, and WC = 60 lb, respectively. If the coefficientsof static friction at the surfaces of contact are asshown, determine the smallest horizontal force Pneeded to move block A.Determine the normal reaction (in N) at the vertical surface if the coefficient of friction is 0.25 at the top vertical surface and 0.4 at the bottom horizontal surface.
- The cylinder having a diameter 2.5 ft weighs 57 lb and is 6 ft long. Determine the reaction (lb.) at A neglecting friction. Determine the reaction at B (lb.) neglecting friction. Weight density of water is 62.4 lb/ft3 Sp.gr Gs = 1.6Find the minimum weight of block A in order for motion to be impending down the plane (to the left). Assume the pulley to be frictionless. Given:WB = 180 lbs, θ = 40 °, μ = 0.2 for all surfaces.Determine whether the block shown is in equilibrium and find the magnitude and direction of the friction force when θ=25 and P=750N.