The figure shows a centrifugal clutch consisting in part of a rotating spider A which carries four plungers B. As the spider is made to rotate about its center with a speed w, the plungers move outward and bear against the interior surface of the rim of wheel C, causing it to rotate. The wheel and spider are independent except for frictional contact. If each plunger has a mass of 2.2 kg with a center of mass at G, and if the coefficient of kinetic friction between the plungers and the wheel is 0.45, calculate the maximum moment M which can be transmitted to wheel C for a spider speed of 2870 rev/min.

The figure shows a centrifugal clutch consisting in part of a rotating spider A which carries four plungers B. As the spider is made to rotate about its center with a speed w, the plungers move outward and bear against the interior surface of the rim of wheel C, causing it to rotate. The wheel and spider are independent except for frictional contact. If each plunger has a mass of 2.2 kg with a center of mass at G, and if the coefficient of kinetic friction between the plungers and the wheel is 0.45, calculate the maximum moment M which can be transmitted to wheel C for a spider speed of 2870 rev/min.

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

See similar textbooks

Similar questions

The figure shows the cross section of a uniform 239-lb ventilator door hinged about its upper horizontal edge at O. The door is controlled by the spring-loaded cable which passes over the small pulley at A. The spring has a stiffness of 16.6 lb per foot of stretch and is undeformed when 8-0. If the door is released from rest in the horizontal position, determine the maximum angular velocity reached by the door and the corresponding angle 0. Answer: @max 4.2¹ rad/sec at 8-i
The uniform 24-m robotic arm OB weighs 300 kg and is hinged at its lower end to a fixed support at O. If the actuator C develops a starting torque of 1300 N· m, calculate the total force supported by the pin at O as the arm begins to lift off its support at B. Also find the corresponding angular acceleration a of the robotic link. The cable at A is horizontal, and the mass of the pulleys and the actuator is negligible. (see Figure 2) 1200 mm 30° 16 m Figure 2. 8 m B
The spool has a mass m, and a radius of gyration kG. An inextensible cord is attached to the wall at A. The cord is wound around the inner radius, R, and the outer radius is 2R. The coefficient of friction between the spool and the ground is mu. If instead of applying the force, F, at point B, the spool has an initial angular velocity given as omega naught. Use the work-energy principle to determine how far the center G will move before stopping.
A single cylinder horizontal engine runs at 120 r.p.m. The length of stroke is 400 mm. The mass ofthe revolving parts assumed concentrated at the crank pin is 100 kg and mass of the reciprocatingparts is 150 kg. Determine the magnitude of the balancing mass required to be placed opposite tothe crank at a radius of 150mm which is equivalent to all the revolving and 2/3rd of the reciprocating masses. If the crank turns 30° from the inner dead centre, find the magnitude of the unbalancedforce due to the balancing mass solve graphically
Q. The upper and lower arms of Porter governor are 0.25 m each and are pivoted 30 mm from the axis of rotation. The radius of rotation Is 130 mm. The mass of the ball and sleeve are 3 kg and 38 kg respectively. Find the effort and power of the governor.
The spool has mass, m, and a radius of gyration kG. An inextensible cord is attached to the wall at A. The cord is wound around the radius R and the outer radius 2R. The coefficient of friction between the spool and the ground is mu. What it the critical force, Fcrit (force required to cause motion) applied at point B? If force= 2Fcrit what is the linear acceleration of the center of mass? If force= 2Fcrit what is the tension in cord AC?
A single cylinder horizontal engine runs at 120 r.p.m. The length of stroke is 400 mm. The mass of the revolving parts assumed concentrated at the crank pin is 100 kg and mass of the reciprocating parts is 150 kg. Determine the magnitude of the balancing mass required to be placed opposite to the crank at a radius of 150mm which is equivalent to all the revolving and 2/3rd of the reciprocat- ing masses. If the crank turns 30° from the inner dead centre, find the magnitude of the unbalanced force due to the balancing mass.
The speed of the pickup truck’s engine is controlled by the Porter governor with 4 arms of equal length, and pivot on the axis of rotation. Each ball has a mass of 4 kg and the mass of the central load on the sleeve is 20 kg. The radius of rotation of the ball is 150 mm when the governor begins to lift, and 200 mm when the governor is at maximum speed. The initial angular speed of the engine’s crank is 14 rad/s, and it has reached a maximum speed at an acceleration of 0.4 rad/s2 after 5 seconds.a) If the speed of the crank of an engine is equal to the speed of its governor, calculate the angle between the upper arm and axis of rotation (?) when the governor starts to lift and when it is at maximum speed.b) Prove that the length of the governor’s arms is equal
The speed of the pickup truck’s engine is controlled by the Porter governor with4 arms of equal length, and pivot on the axis of rotation. Each ball has a massof 4 kg and the mass of the central load on the sleeve is 20 kg. The radius ofrotation of the ball is 150 mm when the governor begins to lift, and 200 mm whenthe governor is at maximum speed. The initial angular speed of the engine’scrank is 14 rad/s, and it has reached a maximum speed at an acceleration of 0.4rad/s2 after 5 seconds. 2.1. If the speed of the crank of an engine is equal to the speed of its governor,calculate the angle between the upper arm and axis of rotation (?) when thegovernor starts to lift and when it is at maximum speed.(11)2.2. Prove that the length of the governor’s arms is equal.
Exactly one turn of a flexible rope with mass m is wrapped around a uniform cylinder with mass M and radius R. The cylinder rotates without friction about a horizontal axle along the cylinder axis. One end of the rope is attached to the cylinder. The cylinder starts with angular speed v0 . After one revolution of the cylinder the rope has unwrapped and, at this instant, hangs vertically down, tangent to the cylinder. Find the angular speed of the cylinder and the linear speed of the lower end of the rope at this time. Ignore the thickness of the rope.
The uniform 30-kg bar AB hangs from a pin attached to the 50-kg homogeneous disk C. The system is at rest when the horizontal force P =200N is applied. Find the angular accelerations of the disk and the bar immediately after P is applied.
A large symmetrical drum for drying sand is operated by the geared motor drive shown. If the mass of the sand is 780 kg and an average gear-tooth force of 2.20 kN is supplied by the motor pinion A to the drum gear normal to the contacting surfaces at B, calculate the average offset T of the center of mass Gof the sand from the vertical centerline. Neglect all friction in the supporting rollers. Assume r = 140 mm, R = 680 mm, 0 = 18°. Detail of contact at B B •G Answer:T= mm