Maths Question Watch

JJJJJAAAAMES
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Report Thread starter 3 weeks ago
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The question:
https://imgur.com/a/zbzOast

I have done:

R+20sin30 -20g= 0

Making R= 20g-20sin30

F=µR and F = 20cos30

so µ = (20g-20sin30)/20cos30

so µ= (5√3)/93 but the solution bank says µ= (5√3)/103 even though the book has my answer.

Where have I gone wrong?
Last edited by JJJJJAAAAMES; 3 weeks ago
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Teenie2
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I get the same as you too.
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