20 cm The homogeneous block weights 250 N. Determine the value of P for which the block 30 cm in equilibrium, the coefficient of friction is 0.3 between the plane and the block. 15 cm 10 N 10 cm
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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.The block of weight W is pulled by the force P inclined at the angle to the horizontal. Find the smallest force P and the corresponding angle that would cause impending sliding of the block. The angle of static friction between the block and the ground is s.Two identical chairs, each weighing 14 lb, are stacked as shown. The center of gravity of each chair is denoted by G. The coefficient of static friction is 0.2 at B (the contact point between the chairs) and 0.35 at A, C, and D. Determine the smallest force P that would cause sliding.
- A 1.1-kg disk A is placed on the inclined surface. The coefficient of static friction between the disk and the surface is 0.35. Is the disk in equilibrium if P=5.5N and =30?A 100-lb force acts as shown on a 300-lb crate placed on an inclined plane. The coefficients of friction between the crate and the plane are u. = 0.25 and Hk = 0.20. 300 lb Determine whether the crate is in equilibrium, and find the value of the friction force. 100 Ib 4The weight of the cylindrical tank is negligible in comparison to the weight of water it contains. The coefficient of static friction between the tank and the horizontal surface is µs. 30 -r = 1.5 ft 5 ft Assuming a full tank, find the smallest force P required to tip the tank. c. 655.55 lb d. 722.22 lb Determine the smallest µs that would allow tipping to take place. c. 0.422 d. 0.189 a. 567.41 lb b. 823.11 lb a. 0.256 b. 0.332 If the force P=350 lb initiates tipping, determine the depth of water in the tank. с. 4.22 ft d. 3.45 ft а. 3.08 ft b. 2.89 ft
- 2. The 100 – Ib force acts as shown on a 300 - Ib block placed on an inclined plane. The coefficients of friction between the block and the plane are us = 0.25 and Hk = 0.20. Determine whether the block is in equilibrium, and find the value of the friction for the friction force. 300 Ib 100 lbThe crate has a weight of W = 350 lb and the %3D coefficient of static Friction between the crate and the ground is µs = 0.3. If the angle %3D e = 45° and P = 100 lb, the normal force 'N' exerted on the crate is. Select one: a. 83.79-lb b. 70.71-lb С. О d. 279.29-lbThe 69-kg crate is stationary when the force P is applied. Determine the resulting acceleration of the crate if (a) P = 0, (b) P = 255 N, and (c) P = 503 N. The acceleration is positive if up the slope, negative if down the slope. P 20° 69 kg Hg = 0.29 μk = 0.21
- 1. The center of gravity of the 60 kN block is at G. The static coefficient of friction between the block and the inclined surface is 0.30. Determine; a. the frictional force between the block and the inclined plane. b. the smallest force P for which the block will move up the inclined plane without tipping. c. the largest distance h for which the block will move up the inclined plane without tipping. G P 1.0m 0.80m 20° 0.50m 0.50mA 250 lb refrigerator is being pushed. You do not know what force P should be applied. The coefficient of static friction between the refrigerator and floor is lg = 0.4. The center of gravity of the refrigerator is at point G. - d2 -- d2 F1 d3 d1 d4 Values for the figure are given in the following table. Note the figure may not be to scale. Variable Value di 4.5 ft d2 1.5 ft d3 2.5 d4 3.5 a. Determine the force P that is needed to overcome friction. b. Determine the location of the normal force r measured from the center of the refrigerator if the force P from part a is applied. c. Determine the minimum force P that is required to tip the refrigerator. d. Will the refrigerator slip or tip first? Round your final answers to 3 significant digits/figures. P= lb ft Pip = lb Will the refrigerator slip or tip first? tip O slipThe 500KN block shown is in contact with a 45°incline. The w coefficient of friction is 0.25. Determine the horizontal force P necessary to 1.Just start the block up the 45° incline 2.Just to prevent the motion down the incline. 3.lf P=400KN, what is the amount and direction of friction force?