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Thread: General Questions Thread

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    General Questions Thread

    Ok, I'm confused.

    The rate of gravitational acceleration is 9.8 m/s2

    Now, when it's expressed as 9.8 m/s/s - I get that, the rate increases 9.8m per second, every second. Hence;

    0s = 0
    1s = 9.8m
    2s = 19.6m
    3s = 29.4m
    4s = 39.2m

    That all makes sense to me. However, when expressed as 9.8 m/s2 - I don't understand the squaring bit = how does that work in terms of the calculation?

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    Senior Member SincereTheRebel's Avatar
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    Senior Member Pepe's Avatar
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    The velocity increases 9.8 m/s every second.

    The /s/s part is where the square comes from (m/s)/s = (m/s)*(1/s) = (m/s^2)

    Your table is not correct, btw. That would not be the distance traveled.

    0s = 0
    1s = 9.8m/s
    2s = 19.6m/s
    3s = 29.4m/s
    4s = 39.2m/s

    That would be correct, for velocity. Distance is different.

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    Quote Originally Posted by Pepe View Post
    The velocity increases 9.8 m/s every second.

    The /s/s part is where the square comes from (m/s)/s = (m/s)*(1/s) = (m/s^2)

    Your table is not correct, btw. That would not be the distance traveled.

    0s = 0
    1s = 9.8m/s
    2s = 19.6m/s
    3s = 29.4m/s
    4s = 39.2m/s

    That would be correct, for velocity. Distance is different.
    Cheers.

    I'm gonna have to think about "(m/s)/s = (m/s)*(1/s) = (m/s^2)" and get back to you.

    For the table, I just omitted the /s by mistake - I get that that's the velocity, not distance.
    Last edited by John Arne; 18-02-2020 at 04:51 PM.

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    Senior Member Pepe's Avatar
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    It seems that omitting it is what is causing your confusion. If you include it, then you can just divide your velocity (right column) by your time (left column) and the s^2 will show up.

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    Quote Originally Posted by Pepe View Post
    It seems that omitting it is what is causing your confusion. If you include it, then you can just divide your velocity (right column) by your time (left column) and the s^2 will show up.
    Ok, let's take 39.2m/s, divide by our time, so 39.2m/s divide 4s = 9.8m/s. Nothing has, or needs to be squared... Am I being really thick here?

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    Senior Member mugbull's Avatar
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    The seconds are being squared, mate

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    Bookie Sir Andy Mahowry's Avatar
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    Squares are a nice shape.

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    I prefer odd sided figures. Triangles, for example.

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    Custom User Title phonics's Avatar
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    Fucking nerds.

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    ram it up your shitpipe Giggles's Avatar
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    Quote Originally Posted by bruhnaldo View Post
    I prefer odd sided figures. Triangles, for example.
    Circles top all.

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    Senior Member Disco's Avatar
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    The ultimate one sided shape.

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    Quote Originally Posted by mugbull View Post
    The seconds are being squared, mate
    So, 4s squared is 16s... where does that get involved?

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    Administrator SvN's Avatar
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    The squared denotes that it's per second, per second.

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    Senior Member Disco's Avatar
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    Is it not just shorthand to save writing 'per second per second' every time.

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    Senior Member mugbull's Avatar
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    Quote Originally Posted by John Arne View Post
    So, 4s squared is 16s... where does that get involved?
    39.2 m/s divide by 4 s is 9.8 m/s^2.

    x/y divided by y is x/y^2

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    Quote Originally Posted by SvN View Post
    The squared denotes that it's per second, per second.
    Quote Originally Posted by Disco View Post
    Is it not just shorthand to save writing 'per second per second' every time.
    If that's the case, it makes sense. I just couldn't work out with the squaring function came in - if it just denotes /s/s, then I get it.

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    Senior Member John's Avatar
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    Quote Originally Posted by John Arne View Post
    So, 4s squared is 16s... where does that get involved?
    You're squaring the second notation, not the number of seconds.

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    Senior Member Pepe's Avatar
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    Quote Originally Posted by John Arne View Post
    So, 4s squared is 16s... where does that get involved?
    No. (4s)^2 is 16s^2. Need to be careful with notation. Math is applied to units just as it is to numbers.

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    Senior Member Spikey M's Avatar
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    There's no missing the squares in this thread.

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    Senior Member -james-'s Avatar
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    Dimensional analysis.

    Nothing better than working on a big fuck-off equation, cancelling out basically everything and being left with F = ma or something.

  22. #22
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    idk pussy, maybe.

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    Senior Member Spikey M's Avatar
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    P = m

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    Isn't he banned? Baz's Avatar
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    Quote Originally Posted by bruhnaldo View Post
    idk pussy, maybe.
    I'm a twit

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    Senior Member hfswjyr's Avatar
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    This isn't going to be a General Questions Thread is it?

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    Senior Member Jimmy Floyd's Avatar
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    I'd say that if anything, that looks like quite a specific question.

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    Senior Member Disco's Avatar
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    We could use it for questions about Generals. Why did Douglas MacArthur wear that dumb hat? Etc

  28. #28
    Webly Ian's Avatar
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    Other acceptable topics include Command & Conquer: Generals and the Washington Generals.

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    Senior Member Spikey M's Avatar
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    Can I slip in a sly question about what the Grand Old Duke of York's deal was?

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    Senior Member Disco's Avatar
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    He was really indecisive.

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    Webly Ian's Avatar
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    I'd say take it to the Duke thread but it's overrun with Mert, sadly.

  32. #32
    I used to be funny.
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    I can confirm he had 10,000 men.

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