1. Determine the largest value of couple moment MM just before the disk begins to slip.  (answer is lb*ft) 2. At the moment before the disk begins to slip (impending motion), determine the magnitude of the normal force at point A, otherwise known as NA.  (answer is lb) 3. At the moment before the disk begins to slip (impending motion), determine the magnitude of the normal force at point BB, otherwise known as NB. (answer is lb)

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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1. Determine the largest value of couple moment MM just before the disk begins to slip.  (answer is lb*ft)

2. At the moment before the disk begins to slip (impending motion), determine the magnitude of the normal force at point A, otherwise known as NA.  (answer is lb)

3. At the moment before the disk begins to slip (impending motion), determine the magnitude of the normal force at point BB, otherwise known as NB. (answer is lb)

 
A brass disk of radius 0.5 ft and weight 412 lb sits in a right-angle groove made of granite.
The disk makes contact with the groove at A and B and the coefficient of static friction at both points are us = 0.32
A couple moment of M is applied to the disk as shown.
B
45°
45°
We want to find the largest couple moment M that can be applied to the disk before it starts slipping.
Transcribed Image Text:A brass disk of radius 0.5 ft and weight 412 lb sits in a right-angle groove made of granite. The disk makes contact with the groove at A and B and the coefficient of static friction at both points are us = 0.32 A couple moment of M is applied to the disk as shown. B 45° 45° We want to find the largest couple moment M that can be applied to the disk before it starts slipping.
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