7:53 PM←friction problems.pdfis V.3. Determine the force to be appreu to Dick D w produce the impending moonblock B down the plane.50⁰Fig-5Fig-66. Find the value of 0 if the blocks A and B shown in Fig.6. have impending motion. Givenblock A = 20 kg, block B = 20 kg. HAHB=0.25.7.Find force P required to pull block B (shown in Fig. 7). Coefficient of friction between Aand B is 0.3 and between B and floor is 0.25. Weights of A = 20 kg and B = 30 kg.BPBwww/www/30°Fig-980 N60°50 N1,0.3040 NFig-7Fig-88. Three blocks are placed on the surface one above the other as shown in Fig. 8. The staticcoefficient of friction between the blocks and block C and surface is also shown. Determinethe maximum value of P that can be applied before any slipping takes place.B9. Two rectangular blocks of weight, W₁ = 150 N and W2 = 100 N are connected by a stringand rest on an inclined plane and on a horizontal surface as shown in Fig.9. The coefficientof friction for all contiguous surfaces is m = 0.2. Find the magnitude and direction of theleast force P at which the motion of the blocks will impend. (Ans. P = 161.7 N and 0 =11.31")H-0.4030°H=0,25TH=0.1530 kg50 kgTTTTTH. 0.450.40 40 kgFig-1010. The three flat blocks are positioned on the 30⁰ incline, as shown in Fig. 10, and a force Pparallel to the incline is applied to the middle block. The upper block is prevented frommoving by a wire which attaches it to the fixed support. The coefficient of static frictionfor each of the three pairs of surfaces is shown. Determine the maximum value which Pmay have before any slipping takes place. Take g = 10 m/s.(Ans: P= 95.58 N)Ladder Friction11. A ladder 5 meters long rests on a horizontal ground and leans against a smooth verticalwall at an angle 70° with the horizontal. The weight of the ladder is 900 N and acts at itsmiddle. The ladder is at the point of sliding, when a man weighing 750N stands on a rung1.5 meter from the bottom of the ladder. Calculate the coefficient of friction between theladder and the floor.12. A uniform ladder of 4 m length rests against a vertical wall with which it makes an angleof 45°. The coefficient of friction between the ladder and the wall is 0.4 and that betweenladder and the floor is 0.5. If a man, whose weight is one-half of that of the ladder ascendsit, how high will it be when the ladder slips?13. A uniform ladder 3 m long weighs 200 N. It is placed against a wall making an angle of60° with the floor as shown in Fig. 13.The coefficient of friction between the wall and the ladder is 0.25 and thatladdaJeden 0.2 The 13.4G+#all56:

Given-Information:- A = 20kgB = 20kg μA = μB = 0.25 To-Determine:- The value of q

Answered: 30% Fig-5 Fig-6 6. Find the value of 0…

Engineering

Mechanical Engineering

30% Fig-5 Fig-6 6. Find the value of 0 if the blocks A and B shown in Fig.6, have impending motion. Given

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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