Based on Problem 8-13 from the textbook.The brake is to be designed to be self locking,that is, it will not rotate when no load P isapplied to it when the disk is subjected to aclockwise couple moment Mo. Determine thedistance d of the lever that will allow this tohappen. The coefficient of static friction at Bis H₂-Us=0.48a=0.6ftPaMo1 ft

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Answered: The brake is to be designed to be self…

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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Q3/ If the coefficients of friction between brake arm and cylinder Cis 0.3 and between cylinder C and the floor is 0.12, determine the minimum force P required to hold the cylinder from the rotation. Note that the weight of the cylinder Cis 1000 Ib and neglect the weight of the brake arm? 5-15 Higd 20" 10" 0" 1500-ib
Calculate the horizontal force P on the light 14° wedge necessary to initiate movement of the 54-kg cylinder. The coefficient of static friction for both pairs of contacting surfaces is 0.37. Also determine the friction force FB at point B. (Caution: Check carefully your assumption of where slipping occurs.) P Answers: P = FB i i 149 54 kg B N N A
The mine car and its contents as shown in Figure Q1 have a total mass of 6 Mg and a center of gravity at G. If the coefficient of static friction between the wheels and the tracks is µs = 0.4 when the wheels are looked. 10 kN 0.9 m •G AJ0.15 m B 0.6 m -1.5 m- Figure Q1 a) Calculate the normal force acting on the front wheels at B and the rear wheels at A when the brakes at both A and B are looked. b) Evaluate either the car move or not. Justify your answer.
8-13. The brake is to be designed to be self locking, that is, it will not rotate when no load P is applied to it when the disk is subjected to a clockwise couple moment Mo. Determine the distance d of the lever that will allow this to happen. The coefficient of static friction at B is flg = = 0.5. P -1.5 ft 1.5 ft B Mo 1 ft AC d
Determine the minimum coefficient of static friction between the uniform 78.5-kg spool and the wall so that the spool does not slip. 60° B 0.6 m 0.3 m
The block brake is used to stop the wheel from rotating when the wheel is subjected to a couple moment Mo = 540 N.m. If the 0.6m 0:4m coefficient of static friction between the wheel and the block is 0.5, determine the smallest force P that should be applied. Cx 1m O A) 0.4 m 0.05m B 0.05 m Ne 0,3 m Draw free body diagram of the block brake. (ignore the weight of the wheel) 0.6m 0.4m Which following one is true? O B) Cx 0.05m P. No 0-6m 0.4M 0.05m P 0-6m 0.4M Cx O D) Fs 6.05m No P. 0-6m J 0.4m Ca Ne
If the cocfficient of static friction at C is µ, = 0.3, determine the largest force F that can be applied to the 5-kg ring. without causing it to slip. Neglect the thickness of the ring
HAD Q3/ If the coefficients of friction between brake am and cylinder C is 0.3 and between cylinder Cand the floor is 0.12, determine the minimum force P required to hold the cylinder from the rotation. Note that the weight of the cylinder Cis 1000 Ib and neglect the weight of the brake arm? 5-15 Higd 20" 10" 0" 1500in -1b
The wedge is used to level the member. Determine the reversed horizontal force -P that must be applied to pull the wedge out to the left. The coefficient of static friction between the wedge and the two surfaces of contact is 1s = 0.15. Neglect the weight of the wedge.
The limiting friction force bears a constant ratio to the normal reaction. Select one: True False
Problem 2: Determine the force P necessary to start the V-shaped wedge to the right if the coefficient of friction is f= 0.445 at each of the three surfaces of contact. WB =1000N WA =200N в P- 30° 150

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