Can I solve this problem by calculating the initial kinetic energy with respect to G instead of A. R18-6. At the instant shown, the 50-lb bar rotatesclockwise at 2 rad/s. The spring attached to its end alwaysremains vertical due to the roller guide at C. If the spring hasan unstretched length of 2 ft and a stiffness of k = 6 lb/ft,determine the angular velocity of the bar the instant it hasrotated 30° clockwise.2 rad/s6 ftCB4 ft

Answered: Image /qna-images/answer/678a6a26-8ada-44c8-a83d-10eb1d2f7958.jpg

Answered: R18-6. At the instant shown, the 50-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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R18-6. At the instant shown, the 50-lb bar rotates clockwise at 2 rad/s. The spring attached to its end always remains vertical due to the roller guide at C. If the spring has an unstretched length of 2 ft and a stiffness of k = 6 lb/ft, determine the angular velocity of the bar the instant it has rotated 30° clockwise. 4 ft 2 rad/s 6 ft
The telephone-cable reel rolls without slipping on the horizontal surface. If point A on the cable has a velocity VÀ = 0.84 m/s to the right, compute the velocity of the center O (positive if to the right, negative if to the left) and the angular velocity w (positive if counterclockwise, negative if clockwise) of the reel. Answers: Vo = W = 1.91 m 4 0.69 m 1.315 i 1.376 Ho m/s VA rad/s
The 110-kg wheel has a radius of gyration about its center O of ko = 220 mm, and radius r = 0.4 m. When the wheel is subjected to the constant couple moment M = 63 N•m, it starts rolling from rest. Determine the wheel's angular velocity W (in rad/s) after 6.0 seconds if the wheel 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. Take g = 9.81 m/s². T M Your Answer: Answer
The wheel is rotating with an angular velocity and angular acceleration at the instant shown. Determine the angular velocity and angular acceleration of the bar at this instant. The bar slides freely by the flat ring. 300 mm w = 8 rad/s a = 4 rad/s 720 mm-
The 153-kg wheel has a radius of gyration about its center of mass O of kO = 283 mm. If it rotates counterclockwise at an angular speed of 1431 rev/min and the tension force applied to the braking band at A is TA = 1771N,a) Determine the angular acceleration, in rad/s2, so that the wheel comes to rest in 67.6 revolutions after TA and TB are applied.
The telephone-cable reel rolls without slipping on the horizontal surface. If point A on the cable has a velocity VA = 0.70 m/s to the right, compute the velocity of the center O (positive if to the right, negative if to the left) and the angular velocity w (positive if counterclockwise, negative if clockwise) of the reel. 1.72 m A Answers: Vo = W= 0.60 m 1.075 i 1.25 m/s rad/s
on the plates A and B, which are moving in opposite directions as shown. If vA = 75 mm/s to The attached wheels roll without slipping the right and vB = 245 mm/s to the left, determine the speeds of the center O and the point Pfor the position shown. Assume r 55 mm, R 160 mm. A R B Answers: mm/s Vo = mm/s Vp =
SOLVE USING PRINCIPLE OF WORK AND ENERGY
The disks roll on the plane surface without slippage. The left disk rotates at 2 rad/s in the clockwise direction. Determine the angular velocity of the bar. Enter an answer in radians per second up to the second decimal place. Note that the counterclockwise direction is the positive rotation. 2 rad/s 3 ft 1 ft 1 ft
The double pulley consists of two parts that are attached to one another. It has a weight of 52 lb and a radius W= 20 rad/s of gyration about its center of k = 0,9 ft. If it rotates with O an angular velocity of 20 rad>s clockwise, determine the kinetic energy of the system. Assume that neither cable slips on the pulley. @= 20 rad/s 0.5ft 1 ft B 30 lb A 20 lb
At the instant shown, link CD rotates with an angular velocity of @, = 8 rad/s. If link CD is subjected to a couple moment of M= 650 lb- ft, determine the force developed in link AB and the angular acceleration of the links at this instant. Neglect the weight of the links and the platform. The crate weighs 100 lb and is fully secured on the platform. 1 ft 4 ft @CD = 8 rad/s M = 650 lb-ft - 3 ft
3

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