*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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The solid homogeneous cylinder shown has a mass of 30 kg and is rotating at 1200 rpm clockwise about a fixed horizontal axis through O. The coefficient of kinetic friction between the brake and the cylinder is 0.20. If the tension in the spring when the brake is applied is 100 N, determine the time required for the cylinder to stop rotating. Neglect the thickness of the vertical members. (Draw FBD)
The 463-N force is applied to the 89-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 = 463 N 32° H = 0.60 H = 0.44 Answer: F = i N
Q5: The 15 kg cylinder rotates with an angular velocity of 40 rad/s. If a force F = 6 N is applied to the AB bar, as indicated, determine the time required to stop rotation. The coefficient of kinetic friction between the bar and the cylinder is 0.4. Disregard the thickness of the bar. F = 6N 400 mm- 500 mm B 150 mm-
The 66-kg man with center of mass G supports the 33-kg drum as shown. Find the greatest distancex at which the man can position himself without slipping if the coefficient of static friction between his shoes and the ground is 0.45. 5.6 m 33 kg 66 kg 0.9 m Answer:x = i E
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
The angle of static friction between the block with mass M and the plane is ∅ . Show that the minimum value of P for a given angle θ is 9.8M sin (θ + ∅).
A man pushes the lawn mower at a steady speed with aforce P that is parallel to the incline. The mass of themower with attached grass bag is 50 kg with mass centerat G. If  = 15°, determine the normal forces NB and NCunder each pair of wheels B and C. Neglect friction. (useg = 9.81 m/s2)
The torsional spring has a stiffness of 20 N-m/rad and is undeflected when the 3-kg uniform slender bar is in an upright position. If the bar is released from rest in the horizontal position shown, find its angular velocity as it passes the vertical position. Neglect friction effects. 4 Type here to search ThinkVision K - Pan Tab Cape Look Esc Q A Z G FT W S # ONDA 3 F2 E D A $ 4 R F 5 F4 T G XCVB 8 a Y H N P6 F6 U J M F7 K ( F8 F10 F11 +Backspace Enter T F12 Shift Print Screen SysRq Insert 0.5 m Scroll Lock Delete Home Break End Page Up Page Down Naam Lock K 37°F Cloudy Home Lenovo B 20
The 44-kg disk is rotating at w = 130 rad/s. When the force P is applied to the brake as indicated by the graph. The coefficient of kinetic friction at B is µk = 0.5. Neglect the thickness of the brake. (Eigure 1) Figure 1 of 1 P (N) 500 1 (3) 300 mm 300 mm 150 mm 200 mm
The 75-lb boy stands on the beam and pulls on the cord with a force large enough to just cause him to slip. If the coefficient of static friction between his shoes and the beam is (μs)D = 0.35, determine the following reactions if the beam is uniform and has a weight of 120 lb. Neglect the size of the pulleys and the thickness of the beam. 1 The magnitude of the vertical component reaction at A is Blank 1 lb. 2 The magnitude of the horizontal component reaction at B is Blank 2 lb. 3 The magnitude of the vertical component reaction at B is Blank 3 lb.
The 186-kg wheel has a radius of gyration about its center O of ko = 300 mm, and radius r = 0.4 m. When the wheel is subjected to the constant couple moment M = 92 N.m, it starts rolling from rest. Determine the average friction force that the ground applies to the wheel if it has been rolling without slipping. Please pay attention: the numbers may change since they are randomized. Your answer must include 2 places after the decimal point, and proper Sl unit. Take g = 9.81 m/s². M Your Answer: units Answer
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