R19-4. The wheel having a mass of 100 kg and a radius ofgyration about the z axis of k, = 300 mm, rests on thesmooth horizontal plane. If the belt is subjected to a force ofP = 200 N, determine the angular velocity of the wheel andthe speed of its center of mass 0, three seconds after theforce is applied.400 mmP = 200 N

Given : The mass of wheel = 100 kg The radius of gyration = 0.3 m The radius of the wheel = 400 mm=…

Answered: R19-4. The wheel having a mass of 100…

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 2.5-kgkg rod ACBACB supports the two 4.1-kgkg disks at its ends. If both disks are given a clockwise angular velocity (ωA)1=(ωB)1=4.6rad/s(ωA)1=(ωB)1=4.6rad/s while the rod is held stationary and then released, determine the angular velocity of the rod after both disks have stopped spinning relative to the rod due to frictional resistance at the pins AA and BB. Motion is in the horizontal plane. Neglect friction at pin CC.
*18–4. The wheel is made from a 5-kg thin ring and two 2-kg slender rods. If the torsional spring attached to the wheel's center has a stiffness k = 2 N•m/rad, and the wheel is rotated until the torque M = 25 N • m is developed, determine the maximum angular velocity of the wheel if it is released from rest. 0.5 m M
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F18-3. The uniform 50-kg slender rod is at rest in the position shown when P = 600 N is applied. Determine the angular velocity of the rod when the rod reaches the vertical position. 4 m P = 600 N
19–33. The 80-kg man is holding two dumbbells while standing on a turntable of negligible mass, which turns freely about a vertical axis. When his arms are fully extended, the turntable is rotating with an angular velocity of 0.5 rev/s. Determine the angular velocity of the man when he retracts his arms to the position shown. When his arms are fully extended, approximate each arm as a uniform 6-kg rod having a length of 650 mm, and his body as a 68-kg solid cylinder of 400-mm diameter. With his arms in the retracted position, assume the man is an 80-kg solid cylinder of 450-mm diameter. Each dumbbell consists of two 5-kg spheres of negligible size. -0.20 m 0.65 m 0.3 m H0.3 m Prob. 19–33
R18-5. The gear rack has a mass of 6 kg, and the gears each have a mass of 4 kg and a radius of gyration of k = 30 mm at their centers. If the rack is originally moving downward at 2 m/s, when s = 0, determine the speed of the rack when s = 600 mm. The gears are free to turn about their centers A and B. 50 mm 50 mm
F19–4. Gears A and B of mass 10 kg and 50 kg have radii of gyration about their respective mass centers of kA = 80 mm and ks = 150 mm. If gear A is subjected to the couple moment M = 10 N-m when it is at rest, determine the angular velocity of gear B when t = 5 s. 0.2 m 0,1 m M = 10 N- m
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This is a dynamics question. Answer: t = 0.6125 s

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