1. The double pulley shown is attached to a 8-mm-radius shaft that fits loosely in a fixed bearing. If the μ = 0.45 and μ = 0.40 and the weight of the pulley is 25 N, (a) determine the magnitude of the force P required to start raising the load, and (b) determine the magnitude of the force P required to start lowering the load a constant speed. 90 mm 45 mm Ý CI P 20 kg
1. The double pulley shown is attached to a 8-mm-radius shaft that fits loosely in a fixed bearing. If the μ = 0.45 and μ = 0.40 and the weight of the pulley is 25 N, (a) determine the magnitude of the force P required to start raising the load, and (b) determine the magnitude of the force P required to start lowering the load a constant speed. 90 mm 45 mm Ý CI P 20 kg
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 7.78P: The figure shows a steel bar being processed by a rolling mill. Given that P=80kN and r =0.016,...
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