*17-36. The desk has a weight of 75 lb and a center ofgravity at G. Determine the initial acceleration of a deskwhen the man applies enough force Fto overcome the staticfriction at A and B. Also, find the vertical reactions on eachof the two legs at A and at B. The coefficients of static andkinetic friction at A and B are u, = 0.5 and ug = 0.2,respectively.30°1 ft2 ft2 ft-2 ft-

Answered: Image /qna-images/answer/960e8816-89a0-4d4e-a9c4-33b927bbb3aa.jpg

Answered: *17-36. The desk has a weight of 75 lb…

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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17-47 The four-wheeler has a weight of 335 Ib and a center of gravity at G1, whereas the rider has a weight of 150 lb and a center of gravity at Gz. If the engine can develop enough torque to cause the rear wheels to slip, determine the largest coefficient of static friction between the rear wheels and the ground so that the vehicle will accelerate without tipping over. What is this maximum acceleration? In order to increase the acceleration, should the rider crouch down or sit up straight from the position shown? Explain. The front wheels are free to roll. Neglect the mass of the wheels in the
The trailer with its load has a mass of 200 kg and a center of mass at G. If it is subjected to a horizontal force of P = 1000 N, determine the trailer’s acceleration and the normal force on the pair of wheels at A and at B. The wheels are free to roll and have negligible mass.
The spring-held follower AB has a mass of 0.5 kg and moves back andforth as its end rolls on the contoured surface of the cam, where r = 0.15 m and z =(0.02 cos 2θ) m. If the cam is rotating at a constant rate of 30 rad/s, determine theforce component Fz at the end A of the follower when θ = 30°. The spring isuncompressed when θ = 90°. Neglect friction at the bearing C.
14-29 The train car has a mass of 10 Mg and is traveling at 5 m/s when it reaches A. If the rolling resistance is 1/100 of the weight of the car, determine the compression of each spring when the car is momentarily brought to rest
The 10-lb block A travels to the right at va= 2 ft/sec at the instant shown. If the coefficient pf kinetuc friction is uk = 0.2 between the surface and A, determine the velocity of A when it has moved 4ft Block B has a weight of 20 lb. (Unit in m/sec)
17-31 The 150 kg uniform crate rests on the 10 kg cart. Determine the maximum force P that can be applied to the handle without causing the crate to tip on the cart. Slipping does not occur.
15-51. The 30-Mg freight car A and 15-Mg freight car B are moving towards each other with the velocities shown. Determine the maximum compression of the spring mounted on car A. Neglect rolling resistance
17-59 The uniform slender rod has a mass m. If it is released from rest when = 0, determine the magnitude of the reactive force exerted on it by pin B when = 90.
The smooth surface of the vertical cam is defined in part by the curve r =(0.2 cos θ + 0.3) m. The forked rod is rotating with an angular acceleration of 2rad/s^2, and when θ = 45° the angular velocity is 6 rad/s. Determine the force the camand the rod exert on the 2-kg roller at this instant. The attached spring has a stiffnessk = 100 N/m and an unstretched length of 0.1 m.
The uniform bar has a mass m and length l. If it is released from rest when u = 0°, determine the angle u at which it first begins to slip. The coefficient of static friction at O is ms = 0.3.
The double inclined plane supports two blocks A and B, each having a weight of 7 lb as shown below. If the coefficient of kinetic friction between the blocks and the plane is 0.09, determine the acceleration of each block.
The driver attempts to tow the crate using a rope that has a tensile strength of 1 kN. If the crate isoriginally at rest and has a weight of 1,3 kN, determine the greatest acceleration (m/s2) it can have if the coefficient of static friction between the crate and the road is μs=0.4, and the coefficient of kinetic friction is μk=0.3, g=10 m/s2

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