A flat belt passes over two idler pulleys and under a rotating drum of diameter 8 in. The axle of the drum is free to move vertically in a slot, and a spring keeps the drum in contact with the belt. What is the minimum force which should be exerted by the spring if slippage is not to occur when a 30-lb · ft torque is applied to the drum? The coefficient of static friction between belt and drum is 0.30 and the angle of contact is 180 degrees.
A flat belt passes over two idler pulleys and under a rotating drum of diameter 8 in. The axle of the drum is free to move vertically in a slot, and a spring keeps the drum in contact with the belt. What is the minimum force which should be exerted by the spring if slippage is not to occur when a 30-lb · ft torque is applied to the drum? The coefficient of static friction between belt and drum is 0.30 and the angle of contact is 180 degrees.
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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Question
A flat belt passes over two idler pulleys and under a rotating drum
of diameter 8 in. The axle of the drum is free to move vertically in
a slot, and a spring keeps the drum in contact with the belt. What
is the minimum force which should be exerted by the spring if slippage
is not to occur when a 30-lb · ft torque is applied to the drum? The
coefficient of static friction between belt and drum is 0.30 and the
angle of contact is 180 degrees.
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