H.W. A cable is attached to the 20-kg plate B,passes over a fixed peg at C, and is attached to theblock at A. Using the coefficients of static frictionshown, determine the smallest mass of block A sothat it will prevent sliding motion of B down theplane.HA 0.2HB = 0.330H.W Blocks A and B have a mass of 7 kg and 10 kg,respectively. Using the coefficients of static frictionindicated, determine the largest vertical force P whichcan be applied to the cord without causing motion.300 mm400 mm= 04H.W The uniform thin pole has a weight of 50 N and alength of 26m. If it is placed against the rough wall andon the rough box in the position d = 10 m,us = 0.3 at points A, B and CP= 150 NBox weight = 100 NDetermine the distance x when the motion of the poleimpend26H.W.Determine the horizontal force P required to causeslippage to occur. The friction coefficients for thethree pairs of mating surfaces are indicated. The topblock is free to move vertically.100 kgH=0.6050 kgH=0.40H=D0.3020 kg

H.W. A cable is attached to the 20-kg plate B, passes over a fixed peg at C, and is attached to the block at A. Using the coefficients of static friction shown, determine the smallest mass of block A so that it will prevent sliding motion of B down the plane. HA=0.2 HB= 0.3 B. 30

H.W. A cable is attached to the 20-kg plate B, passes over a fixed peg at C, and is attached to the block at A. Using the coefficients of static friction shown, determine the smallest mass of block A so that it will prevent sliding motion of B down the plane. HA=0.2 HB= 0.3 B. 30

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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1. The two 890 N blocks are pushed apart by the 150 wedge of negligible weight. The angle of static friction is 12° at all surfaces. Determine the force P required to start the blocks moving. 890N 890N
H.W. A cable is attached to the 20-kg plate R passes over a fixed peg at C and is attached to the block at A Using the coefficients of static friction shown, determine the smallest mass of block A so that it will prevent sliding motion of B down the plane HA-02 H-03
Determine whether the block shown is in equilibrium and find the magnitude and direction of the friction force when θ=25° and P=750 N.
The uniform pole of length l and mass m is placed against the supporting surfaces shown. If the coeffi- cient of static friction is u, = 0.25 at both A and B, determine the maximum angle 0 at which the pole can be placed before it begins to slip. A 105° В 2.
Determine whether the block shown is in equilibrium, and find the magnitude and direction of the friction force when P= 150 N.
is 125 lb. The The weight of block A in Fig. weights of the lever and cylinder can be neglected, and the pin at D is frictionless. If the coefficient of friction is 0.50 at B and 0.30 for all other surfaces, determine the force P re- quired to cause impending motion of block A to the left. 50 Ib 5 in. 10 in. 3 in.
2. The two 200-lb blocks are pushed apart by the 15° wedge of negligible weight. The angle of static friction is 12° at ali contact surfaces. Determine the force P required to start the blocks moving. 1515 200 lb 200 lb
The angle of static friction between the block with mass M and the plane is ∅ . Show that the minimum value of P for a given angle θ is 9.8M sin (θ + ∅).
Determine the maximum downward force Pmax that can be applied to wedge A that will keep the assembly in equilibrium. Based on the value of the force in link BC, determine whether block C will slip or tip first. At Pmax, what are the frictional forces between wedge A and block B, fAB, and between wedge A and wall D, SAD? The weight of block C is 192 N while that of the wedge is negligible. Draw the FBDs of wedge A, block B, and block C. Label correctly all the forces (especially normal and frictional forces with proper subscripts) and indicate the direction of the impending motion next to each FBD. Note that the weight of block B, though not negligible, is not necessary in the computation. W HAD 0.27 D P A B 60° HAB= 0.14 |sg =0 E C 1 m HCF = 0.375 F R 2.4 m 3.2 m
Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part The axle of the pulley is frozen and cannot rotate with respect to the block. The coefficient of static friction between cable ABCD and the pulley is 0.30, Given P= 208 N. D. 60 60° Determine the corresponding reactions at A and D. Assume that the straight portions of the cable meet at point E The reaction at A is The reaction at Dis N 4
The two 200-N blocks are pushed apart by the 15 degrees wedge of negligible weight. The angle of static friction is 10 degrees at all contact surfaces. Determine the force P required to start the blocks moving.
The 80.0-lb boy at A is suspended from the cable that passes over the quarter circular cliff rock as shown in (Figure 1). Determine if it is possible for the 195-lb woman to hoist him up. The coefficient of static friction between the cable and the rock is μ = 0.2, and between the shoes of the woman and the ground ₂ = 0.8. Figure 1 of 1 Part A Determine the tension in the portion of the cable that the woman is holding. Express your answer to three significant figures and include the appropriate units. F= Submit Part B Fmax = = Submit HA Value Request Answer O Determine the maximum possible force due to friction that opposes the motion of the woman. Express your answer to three significant figures and include the appropriate units. μA Value wwww Request Answer Units ? Units ?