13–71. The 150-lb man lies against the cushion for whichthe coefficient of static friction is µ, = 0.5. Determine theresultant normal and frictional forces the cushion exerts onhim if, it due to rotation about the z axis, he has a constantspeed v = 20 ft/s. Neglect the size of the man. Take 0 = 60°.*13-72. The 150-lb man lies against the cushion for whichthe coefficient of static friction is My = 0.5. If he rotatesabout the z axis with a constant speed v = 30 ft/s,determine the smallest angle 0 of the cushion at which hewill begin to slip off.8 ft

Answered: Image /qna-images/answer/7fe5b7a6-c0b6-44fd-bcf3-a89e47235ea7.jpg

Answered: 13–71. The 150-lb man lies against the…

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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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.
The 553-N force is applied to the 96-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. H = 0.71 = 0.51 Answer: F = i 35° N P = = 553 N
Determine the minimum applied force P⃗ P→ required to move the wedge AA to the right. The sping is compressed a distance of 200 mm. Neglect the weight of AA and BB. The coefficient of static friction for all contacting surfaces is μs=0.3μs=0.3. Neglect friction at the rollers.
2. The car has a mass of 1.6 Mg and center of mass at G. If the coefficient of static friction between the shoulder of the road and the tires is µs = 0.4, determine the greatest slope the shoulder can have without causing the car to slip or tip over if the car travels along the shoulder at constant velocity. 2.5 ft 5 ft 4 ll
The Block shown has a velocity v1 = 25 m/s at A and a velocity v2 = of 15 m/s as it passes point B on the incline. Calculate the coefficient of friction between the block and the plane if s= 100m and θ = 25 degree
Q/ The 15 lb block A travels to the right at velocity 3 m/s at the in stant shown. If the coefficient of kin etic friction is µ = 0.2 between the surface and A, determine the velocity of A when it has moved 3 ft. Block B has a w eight of 25 lb. A
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°
Body U with mass 5m is stacked on the top body W with mass m, and released. The bodies are in contact along the frictionless interface at 45 to the vertical. The body U is in contact with the frictionless vertical wall. Body W lies on the floor with coefficient of friction u. Relevant h dimensions are shown in the figure. Express the results in U: 5m terms of given quantities: m, g, h and µ (except when u is given numerically). You need not evaluate sin 45° = cos 45° = 2/2. 45 1 Draw the free body diagrams for the two bodies. W: m Find the critical coefficient of friction µ. (i.e., the minimal coefficient friction to prevent sliding). 3h 31 Let u
2. The 150-1b man lies against the cushion for which the coefficient of static friction is µ̟ = 0.5. If he rotates about the z axis with a constant speed of v = smallest angle 0 of the cushion at which he will begin to slip off. 30 ft/s, determine the -8 ft Figure: 13 PO63-064
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.

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