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- 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 100 N force acts as shown on a 30.6 kg block placed on an inclined plane. The coefficients of friction between the block and the plane are µs = 0.25 and µk = 0.2. Determine whether the block is in equilibrium and find the value of the friction force.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 lb
- 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 cmthe system blocks shown below is in equilibrium, the weight of block A is 10 kN and for block B is 35 kN . The coefficient of friction between A and surface is 0.2 and between two block A and B is 0.15. Answer :the following P=40KN The value of friction force between * block A and its surface is 4.0 kN 5.5 kN 6.2 kN O Non above-mentionedTwo blocks of m1 = m2 = 5 kg are connected by the linkage shown. The coefficient of static friction 0.5. Neglect the weight of the links. between the blocks and floor is F1 02, m1 02 m2 Values for the figure are given in the following table. Note the figure may not be to scale. Variable Value 30 degrees 02 30 degrees a. Determine the force F1 that is needed to move block B. b. Determine the force F1 that is needed to move block A. c. Which block will move first?
- Determine whether the block shown is in equilibrium and find the magnitude and direction of the friction force when 0 = 30° and P= 45 lb. Given: μs = 0.30 and k = 0.20. 250 lb The block is not in equilibrium and moves down. True The magnitude and direction of friction force is 86.03 lb 7Determine the magnitude and direction of the friction force exerted on the 100-lb block when (a) 0= 15°, (b) 0= 30°. For both parts, let P 120 lb. Draw separate FBDS for each part of the problem. %3DA system is in equilibrium with the 150 Ibs block having a coefficient of friction of 0.4. Determine the coefficient of friction of the 100 lbs block. Pulley 150 Ibs 100 Ibs 45° 30
- the system blocks shown below is in equilibrium, the weight of block A is 10 kN and for block B is 35 kN . The coefficient of friction between A and surface is 0.2 and between two block A and B is 0.15. Answer :the following P=40KN The coefficient of friction between * block B and surface is 0.24 O 0.63 0.56 O 0.37Q1 Problem 1 Problem 1 A ladder with mass 20 kg is in equilibrium leaning against a frictionless wall. The bottom of the ladder rests on the floor; the coefficient of static friction between the ladder and the floor is 0.6. If the ladder makes an angle of 60° from the floor, find e=60° (a) the magnitude of the vertical normal force exerted on the ladder by the floor, (b) floor. the magnitude of the horizontal static friction force exerted on the ladder by the (c) What is the minimum angle the ladder can make with the floor without slip- ping?Q1: - The block shown in figure below has a mass of 100 kg and is resting on 30° inclined surface. The block is connected to another block with a weight of W through a light and inextensible cord that is passing around a frictionless pully. The coefficient of static friction between the 100 kg block and the inclined surface is 0.45. Determine the minimum and maximum weights of the second block that keep the system in equilibrium. Also, show whether the impending motion is by slipping or by tipping. -300 mm- 100 kg 450 mm 600 mm-