A Porter governor has links 150 mm long and are attached to pivots at a radial distance of 30 mm from the vertical axis of the governor. The mass of each ball is 1.75 kg and the mass of the sleeve is 25 kg. The governor sleeve ready to rise at 300 rpm when the links are at 30 ° to the vertical. Assuming the friction force to be constant, find the value of the friction force, minimum and maximum speed of rotation when the inclination of the links is 45 ° to the vertical.

A Porter governor has links 150 mm long and are attached to pivots at a radial distance of 30 mm from the vertical axis of the governor. The mass of each ball is 1.75 kg and the mass of the sleeve is 25 kg. The governor sleeve ready to rise at 300 rpm when the links are at 30 ° to the vertical. Assuming the friction force to be constant, find the value of the friction force, minimum and maximum speed of rotation when the inclination of the links is 45 ° to the vertical.

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.40P: The 60-lb plank rests on a frictionless roller at A, and the 20-lb triangular support BD. Both...

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