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    Really stuck on this one, any help would be much appreciated.

    A .


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    s = ut + 1/2.at^2

    s = 450, t = 10, u = 0, a = ?

    450 = (0 x 10) + 1/2.a.10^2

    Solve for a.

    P.S. Giving you the mass of the car is a curved-ball; you don't need it to answer this question.
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    Ok, I get it now! Now I feel like an idiot on how simple it actually is

    Thanks!


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    (Original post by VannR)

    P.S. Giving you the mass of the car is a curved-ball; you don't need it to answer this question.
    Yeah, one of the reasons why I was so confused on if I was on the right track or not.


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    (Original post by goodwinning)
    Yeah, one of the reasons why I was so confused on if I was on the right track or not.


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    Same here! Took me a couple of minutes to realise it as well.
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    Just had a look at my notes and it says this has to be solved using simultaneous equations😓


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    (Original post by goodwinning)
    Just had a look at my notes and it says this has to be solved using simultaneous equations😓


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    Simultaneous equations:

    Using v = u + at:

    v = 0 + 10a = 10a

    Subst v in s = vt - 1/2.a.t^2:

    450 = 100a - 50a
    a = 450/50 = 9ms^-2

    The original way:

    Using s = ut + 1/2.a/t^2:

    450 = 0 + 50a
    a = 450/50 = 9ms^-2

    It works out the same; it's obvious which method is better, though.
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    Thanks

    Yeah, the 1st method makes more sense but for my course you have to use simultaneous equations on this particular assignment which is annoying.


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