Form the figure shown, a flexible belt placed around a rotating drum of 4-inch radius acts as a brake when the arm ABCD is pulled down by the force P. The coefficient of kinetic friction between the belt and the drum is 0.7. What force P that would result in a braking torque of 400 lb • in., assuming that the drum is rotating counterclockwise. Neglect the weight of the brake arm. 60° . A 2 in 4 in.. B 4 in. +-2 in 60° D

Form the figure shown, a flexible belt placed around a rotating drum of 4-inch radius acts as a brake when the arm ABCD is pulled down by the force P. The coefficient of kinetic friction between the belt and the drum is 0.7. What force P that would result in a braking torque of 400 lb • in., assuming that the drum is rotating counterclockwise. Neglect the weight of the brake arm. 60° . A 2 in 4 in.. B 4 in. +-2 in 60° D

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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Concept explainers

Clutches, Brakes, Couplings, and Flywheels

The clutch is described as a machine element used to connect or disconnect two shafts together to transmit torque or power. The clutch works on the principles of friction. The clutch is commonly used in automobiles to transfer power from the driving shaft to the driven shaft.

Question

Form the figure shown, a flexible belt placed
around a rotating drum of 4-inch radius
acts as a brake when the arm ABCD is pulled
down by the force P. The coefficient
of kinetic friction between the belt and the
drum is 0.7. What force P that
would result in a braking torque of 400 lb . in.,
assuming that the drum is rotating
Neglect the weight of the
counterclockwise.
brake arm.
60°
4 in.
60°
A
B
C
-2 in.²4in. 2 in.
42×-|
-2
D
P

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