19-39. The 12-kg rod AB is pinned to the 40-kg disk. If thedisk is given an angular velocity wn = 100 rad/s while therod is held stationary, and the assembly is then released,determine the angular velocity of the rod after the disk hasstopped spinning relative to the rod due to frictionalresistance at the bearing B. Motion is in the horizontalplane. Neglect friction at the pin A.0.3 m

Consider mD as the mass of the disk, r as the radius, l as the length of the rod, mR as the mass of…

Answered: 19-39. The 12-kg rod AB is pinned to…

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 circular disk of mass m and radius r, is rolling through the bottom of the circular path of radius R. If the disk has an angular velocity determine the force N exerted by the path on the disk.
The 18-kg rod AB is pin-connected at A and subjected to a couple moment of M =15 N- m The rod is released from rest when the spring is unstretched at 0 = 30°. As the rod rotates, the spring always remains horizontal, because of the roller support at C. (Figure 1) Determine the rod' s angular velocity, measured clockwise, at the instant 0 = 60°. Express your answer using three significant figures. Enter positive value if the angular velocity is clockwise and negative value if the angular velocity is counterclockwise. vec rad/s k = 40 N/m 0.75 m M = 15 N- m
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Example: 18-63. The uniform 80-lb garage door is guided at its ends on the track. If it is released from rest at 0 = 0º, determine the door's angular velocity at the instant = 30°. The spring is originally stretched 1 ft when the door is held open, 0 = 0°. Assume the door can be treated as a thin plate, and there is a spring and pulley system on each of the two sides of the door. Solution: 8 ft A 8 ft B k = 9 lb/ft
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The uniform 50-kg sphere has radius r = 0.2 m and is welded to the center of the uniform 30-kg shaft as shown. When a constant couple moment M is applied to the shaft, its angular velocity reaches 74 rad/s after 4 s. Determine the magnitude of the moment M. Write your answer in N.m but do not write the units. M R= 0.1 m Taylor e m Te am Answer: Answer
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