Determine whether the block shown is in equilibrium and find the magnitude and direction of the friction force when 0 = 30° and P=45 lb. Given: μs = 0.30 and k = 0.20.250 lbThe block is not in equilibrium and moves down.TrueThe magnitude and direction of friction force is86.03 lb 7

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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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Determine whether the block shown is in equilibrium and find the magnitude and direction of the friction force when 0 = 30° and P=
45 lb. Given: μs = 0.30 and k = 0.20.
250 lb
The block is not in equilibrium and moves down.
True
The magnitude and direction of friction force is
86.03 lb 7

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This is still the wrong answer for McGraw Hill. Each answer I try is wrong, so not sure if I'm doing the problem wrong. It's not 71.70 or 71.07.

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71.7 is being marked wrong in McGraw Hill homework. I thought I had done it right with putting 86.03 but that is wrong also. I'm not trying to just find the answer, trying to find how to do this. Could there be a different number than 71.7? Where does the μk=0.20 come into the equation?

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