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Math Help - More vecs lol (I suck)

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    More vecs lol (I suck)

    Vector A has y - component Ay = +12.0m A makes an angle 32.0 degrees counterclockwise from the + y - axis.

    How do you do this more likely how do you draw this.

    What is the x-component of vector A?

    What is the magnitude of vector A?
    Last edited by Oldspice1212; October 1st 2012 at 05:22 PM.
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    Re: More vecs lol (I suck)

    Edit: the questions it was asking
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    Re: More vecs lol (I suck)

    Quote Originally Posted by Oldspice1212 View Post
    Vector A has y - component Ay = +12.0m A makes an angle 32.0 degrees counterclockwise from the + y - axis.

    How do you do this more likely how do you draw this.

    What is the x-component of vector A?

    What is the magnitude of vector A?
    So draw your Cartesian axes, and draw a vector that makes an angle of 32 degrees counterclockwise from the positive y axis. Make it so that it reaches up as high as 12 units on your y axis. Can you see the right angle triangle? Can you use trigonometry to evaluate the horizontal distance (x component) and the hypotenuse (magnitude)?
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    Re: More vecs lol (I suck)

    First, since the angle is "counterclockwise from the positive y axis", the x component will be negative. Ignoring the sign, you have a right triangle with angle 32 degrees, "near side" of length 12, and "opposite side" of unknown length x. "Tan= Opposite side over near side" gives x/12= tan(32).
    Last edited by HallsofIvy; October 1st 2012 at 05:53 PM.
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    Re: More vecs lol (I suck)

    For Ax I got 10.64m, is this right?
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    Re: More vecs lol (I suck)

    Quote Originally Posted by Oldspice1212 View Post
    For Ax I got 10.64m, is this right?
    I suggest you reread what HallsofIvy wrote, you'll know immediately that it is not quite right...
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    Re: More vecs lol (I suck)

    Lol I just saw it, I got 7.5m for x.
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    Re: More vecs lol (I suck)

    Quote Originally Posted by Oldspice1212 View Post
    Lol I just saw it, I got 7.5m for x.
    Read his post VERY CAREFULLY.
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    Re: More vecs lol (I suck)

    -7.5?!
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    Re: More vecs lol (I suck)

    Correct (to one decimal place at least)

    Now try evaluating the hypotenuse, which is the magnitude of your vector...
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    Re: More vecs lol (I suck)

    10.60 :3
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    Re: More vecs lol (I suck)

    Quote Originally Posted by Oldspice1212 View Post
    10.60 :3
    If the hypotenuse is the longest side of a right angle triangle, and you already have a side that is 12m, how can the hypotenuse possibly be 10.6m?
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    Re: More vecs lol (I suck)

    I'm sick I wasn't thinking, it's 14.15
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    Re: More vecs lol (I suck)

    Quote Originally Posted by Oldspice1212 View Post
    I'm sick I wasn't thinking, it's 14.15
    14.15m is correct.
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    Re: More vecs lol (I suck)

    I love you, can I call you the riddler?
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