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    this is my working: http://imgur.com/EbI2aXE

    i'm not sure where i'm going wrong, or how to do the question as it specified.
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    Feel sorry for you. I can't even draw the damn diagram for this problem.
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    (Original post by djpailo)
    Feel sorry for you. I can't even draw the damn diagram for this problem.
    thanks for the solidarity. much appreciated.
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    (Original post by StarvingAutist)
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    this is my working: http://imgur.com/EbI2aXE

    i'm not sure where i'm going wrong, or how to do the question as it specified.
    Are you sure it's \frac{B}{r^2}? I keep getting \frac{B}{r}, but maybe I'm just tired.
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    (Original post by morgan8002)
    Are you sure it's \frac{B}{r^2}? I keep getting \frac{B}{r}, but maybe I'm just tired.
    well, that's what it says. could be wrong, i suppose. what's your method?
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    I got it!!!!!!! God damn
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    (Original post by StarvingAutist)
    well, that's what it says. could be wrong, i suppose. what's your method?
    I just applied conservation of energy and conservation of angular momentum like it says(set the total system energy and angular momentum to some constants), and I got the equation they say, but with r instead of r^2 like I said.
    I'll check it again tomorrow.
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    I thought it was impossible, i was just about to give up, but then.... ah im so high right now
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    (Original post by morgan8002)
    I just applied conservation of energy and conservation of angular momentum like it says(set the total system energy and angular momentum to some constants), and I got the equation they say, but with r instead of r^2 like I said.
    I'll check it again tomorrow.
    (Original post by EricPiphany)
    I thought it was impossible, i was just about to give up, but then.... ah im so high right now
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    ah okay, i think i see now.
    btw just stumbled upon this exact problem in the lecture notes... i suppose this is why i should go to lecures
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    (Original post by StarvingAutist)
    ah okay, i think i see now.
    btw just stumbled upon this exact problem in the lecture notes... i suppose this is why i should go to lecures
    :yes:
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    (Original post by StarvingAutist)
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    this is my working: http://imgur.com/EbI2aXE

    i'm not sure where i'm going wrong, or how to do the question as it specified.
    Was this to be done via Lagrangian methods?
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    (Original post by atsruser)
    Was this to be done via Lagrangian methods?
    I don't think so; Lagrangians hadn't been covered at the time
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    (Original post by StarvingAutist)
    I don't think so; Lagrangians hadn't been covered at the time
    OK. It looks like the kind of question that's easier with Lagrangians, though.
 
 
 
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