20-11. The electric fan is mounted on a swivel supportsuch that the fan rotates about the z axis at a constant rateof w, = 1 rad/s and the fan blade is spinning at a constantrate w, = 60 rad/s. If at the instant o = 45°, d = 2 rad/s forthe motion, determine the angular velocity and the angularacceleration of the blade.

Answered: 20-11. The electric fan is mounted on a…

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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16-89 If rod CD is rotating with an angular velocity Wcd = 4 rad/s, determine the angular velocities of rods AB and CB at the instant shown.
The wheel is spinning about shaft ABAB with an angular velocity of ωs=10rad/sωs=10rad/s, which is increasing at a constant rate of ω˙2=6rad/s2ω˙2=6rad/s2, while the frame precesses about the zzz axis with an angular velocity of ωp=12rad/sωp=12rad/s, which is increasing at a constant rate of ω˙p=3rad/s2ω˙p=3rad/s2. Determine the velocity of point CC located on the rim of the wheel at this instant. Determine the acceleration of point CC located on the rim of the wheel at this instant.
The flywheel rotates with an angular speed of w = 8 rad/s and an angular velocity = 16 rad/s2. Determine the tangential velocity at point B.
If the hub gear H and ring gear R have angular velocities Wh = 5rad/s and Wr = 20rad/s, respectively. Determine the angular velocity
The crank AB is rotating with a constant angular velocity of 4 rad/s. Determine the angular velocity of the connecting rod CD at the instant θ=30°.
18-9 The pendulum consists of a 10 kg uniform disk and a 3 kg uniform slender rod. If it is released from rest in the position shown, determine its angular from velocity when it rotates clock wise .
At the instant shown, the 200-lb bar rotates clockwise at 4 rad/s. The spring attached to its endalways remains vertical due to the roller guide at C. If the spring has an unstretched length of 2ft and a stiffness of k = 9 lb/ft, determine the angular velocity of the bar the instant it has rotated 39° clockwise.
The rotation of link AB creates an oscillating movement of gear F. If AB has aconstant angular velocity of AB=6 rad/s, determine the angular velocity. Gear E is rigidly attached to arm CD and pinned to a fixed point.
19-26 The double pulley consists of two wheels which are attached to one another and turn at the same rate. The pulley has a mass of 15 kg and a radius of gyration of = 110 mm. if the block at A has a mass of 40 kg and the container at B has a mass of 85 kg, including its contents, determine the speed of the container when t = 3s after it is released from rest.
The 30 kg rod is released from rest when theta =0°. The spring is unstretched when theta = 0°. Find the angular velocity of the rod when theta = 30° and length of stretched spring is 1 m.
If the collar at C is moving downward to the left at v(c)=8 m/s, determine the angular velocity of link AB at the instant shown.
19-31 The 75 kg gymnast lets go of the horizontal bar in a fully stretched position A, rotating with an angular velocity of = 3 rad/s. estimate his angular velocity when he assumes a tucked position B. assume the gymnast at position A and B as a uniform slender rod and a uniform circular disk, respectively.

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