M1 Statics Question: Where have I gone wrong? Watch

creativebuzz
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Can you spot where I went wrong?
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ghostwalker
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(Original post by creativebuzz)
Can you spot where I went wrong?
Seems OK as far as I can read it, but I can't make out the last two lines of working.
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creativebuzz
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(Original post by ghostwalker)
Seems OK as far as I can read it, but I can't make out the last two lines of working.
Hopefully this a bit more clear..

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brianeverit
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(Original post by creativebuzz)
Hopefully this a bit more clear..

You are asked to find the value of R so you should eliminate P from your two equations and get a numerical value nfor R.
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creativebuzz
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(Original post by brianeverit)
You are asked to find the value of R so you should eliminate P from your two equations and get a numerical value nfor R.
Surely I should still get the right answer if I were to find P and then substitute it back into the first equation to find R?
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User1443542
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(Original post by creativebuzz)
Surely I should still get the right answer if I were to find P and then substitute it back into the first equation to find R?
You should, as you're effectively doing part b, before part a.
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