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    For Q13c), I got times as 2 and -2/7, whereas the answer in the book gives both values as positive. Is this a mistake on my part?
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    (Original post by pippabethan)
    For Q13c), I got times as 2 and -2/7, whereas the answer in the book gives both values as positive. Is this a mistake on my part?
    Haven't worked through it, but you should be able to recognise that a negative value of t is usually incorrect :cute:
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    (Original post by pippabethan)
    For Q13c), I got times as 2 and -2/7, whereas the answer in the book gives both values as positive. Is this a mistake on my part?
    Can you show us your working? I have a good hunch of where the sign slip comes from but I'd need to see your working to confirm it.
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    (Original post by Zacken)
    Can you show us your working? I have a good hunch of where the sign slip comes from but I'd need to see your working to confirm it.
    It should be attached alongside the question?
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    (Original post by pippabethan)
    It should be attached alongside the question?
    Officially confirmed as blind. Apologies, will have a look now,
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    (Original post by pippabethan)
    It should be attached alongside the question?
    Okay, yeah - I agree with you in that it should be t = 2 or t = -2/7 (although I feel like I'm missing something...) but you can't have negative time, so you need to throw the latter answer away.
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    (Original post by Zacken)
    Okay, yeah - I agree with you in that it should be t = 2 or t = -2/7 (although I feel like I'm missing something...) but you can't have negative time, so you need to throw the latter answer away.
    So there's only the answer corresponding to t=2 for part d?
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    (Original post by pippabethan)
    So there's only the answer corresponding to t=2 for part d?
    I'm fairly sure, I might be missing something, though.
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    (Original post by Zacken)
    I'm fairly sure, I might be missing something, though.
    Okay, thank you!!
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    (Original post by pippabethan)
    Okay, thank you!!
    If I'm wrong, I'm sure somebody like Ghostwalker will jump in and remedy it in due course. I don't think so, though. :lol:
 
 
 
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