F14–10. The coefficient of kinetic friction between the20-kg block and the inclined plane is He = 0.2. If the blockis traveling up the inclined plane with a constant velocityv = 5 m/s, determine the power of force F.30

Answered: F14–10. The coefficient of kinetic…

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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Two blocks A and B have a weight of 11 lb and 6 lb , respectively. They are resting on the incline for which the coefficients of static friction are μA = 0.16 and μB = 0.23. Determine the angle θ which will cause motion of one of the blocks. What is the friction force under each of the blocks when this occurs? The spring has a stiffness of k = 2 lb/ft and is originally unstretched. Determine the smallest angle θ which will cause motion of one of the blocks. Determine is the friction force under the block A at this angle. Determine is the friction force under the block B at this angle.
Block A has a mass of 26 kg and block B has a mass of 43 kg. The two blocks are stacked on the ramp with an incline of 0 = 33°. Determine the largest horizontal force F that can be applied to block B without either block moving for each of the following two cases: a.) The friction coefficient for the contact between blocks A and B is Ha1 = 0.62 and the friction coefficient for the contact between block A and the ramp is H2 = 0.26. b.) The friction coefficient for the contact between blocks A and B is Ha1 = 0.62 and the friction coefficient for the contact between block A and the ramp is H2 = 0.65. F В A Part a) The limiting slip condition occurs at the contact betveen A and the ramp ♥ N The maximum force before either block A or B slips is Part b) The limiting slip condition occurs at the contact between A and B N. The maximum force before either block A or B slips is
The 490-N force is applied to the 81-kg block, which is stationary before the force is applied. Determine the magnitude and direction of the friction force F exerted by the horizontal surface on the block. The force is positive if to the right, negative if to the left. P = 490 N 28° H. = 0.74 H = 0.57
Under the man's pushing force P= 34.8 lb, the uniform cabinet is sliding on the ground with a constant acceleration of a. If the uniform cabinet has weight of 150 lb, and the coefficient of kinetic friction between the cabinet and the ground is μk = 0.12, determine the normal force reaction under leg A. Please pay attention: the numbers may change since they are randomized. Your answer must include 2 places after the decimal point and proper unit. Take g = 32.2 ft/s². -1 ft- -1 ft- Your Answer: Answer P 4 ft units A 3.5 ft B
Determine the maximum and the minimum values of weight W which may be applied without causing the 25-kg block to slip. The coefficient of static friction between the block and the plane is μs= 0.2, and between the rope and the drum D is μ′s= 0.3.
1. The 40-kg crate is pulled by the constant force P. If the crate starts from rest and achieves a speed of 10 m/s in 9 s, determine the magnitude of P. The coefficient of kinetic friction between the crate and the ground is 0.15. 30°
The 61-lb crate slides down the curved path in the vertical plane. If the crate has a velocity of 6.8 ft/sec down the incline at A and a velocity of 23.5 ft/sec at B, compute the work Uf done on the crate by friction during the motion from A to B. 16' Answer: Uf = i 496.7 ft-lb 6.8 ft/sec 25' B 23.5 ft/se
The truck is traveling at 18 km/h when the trailer coupling at A fails. If the trailer has a mass of 255 kg and it travels a distance of 40 m before coming to a stop, determine the constant horizontal force F created by bearing friction that causes the trailer to stop (in N). NL (O) == O F
2. The car, having a mass of 1000 kg, is traveling horizontally along a 20° banked track which is circular and has a radius of curvature of p = 100 m. If the coefficient of static friction between the tires and the road is us = 0.3, determine the minimum and maximum constant speed at which the car can travel without sliding down and up the slope. Neglect the size of the car. e= 20°
F 15° 0.6 m 1 m The crate has a mass of 58 kg and rests on the inclined platform of the truck. Determine the minimum acceleration that will cause the crate to tip over or slide relative to the forklift. What is the magnitude of this acceleration? The coefficient of static friction between the packaging and the truck is µs= 0.7.
Q2/ The 5-kg collar A slides with negligible friction on the fixed vertical shaft. When the collar is released from rest at the bottom position shown, it moves up the shaft under the action of the constant force F=180 N applied to the cable. Determine the stiffness k which the spring must have if its maximum compression is to be limited to d = 70 mm. The position of the small pulley at B is fixed. Take , h = 450 mm and b = 230 mm . (Use the Work-Energy Equation).

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F14–10. The coefficient of kinetic friction between the 20-kg block and the inclined plane is He = 0.2. If the block is traveling up the inclined plane with a constant velocity v = 5 m/s, determine the power of force F. 30