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    AS Physics

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    The Banker
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    AS Physics

    Post by The Banker on Wed Mar 10, 2010 5:27 pm

    Ahmed, ur da physics guy.. i need help.. and fast :S

    One record suggests that the maximum horizontal distance an arrow has been shot on level ground is 889 m. Assuming that the arrow was shot at 45, at what speed was it launched?

    i got 93.4 m/s
    it looks wrong man slanty
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    Re: AS Physics

    Post by preid1220 on Wed Mar 10, 2010 5:30 pm

    lots of uncounted for variables there^


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    Re: AS Physics

    Post by The Banker on Wed Mar 10, 2010 5:31 pm

    yah, air resistance is menna be neglected slanty
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    Re: AS Physics

    Post by Ahmed on Wed Mar 10, 2010 7:43 pm

    Shouldn't they give you an initial velocity?


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    Re: AS Physics

    Post by The Banker on Wed Mar 10, 2010 7:44 pm

    thats what the question wants...
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    Re: AS Physics

    Post by Ahmed on Wed Mar 10, 2010 7:46 pm

    Oh! Ok shouldn't they give the Vx (initial horizontal velocity)?


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    Re: AS Physics

    Post by The Banker on Wed Mar 10, 2010 7:51 pm

    i used the equation that goes:

    R=(U^2Sin2Ѳ)/g

    [R is the range by the way]
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    Re: AS Physics

    Post by Ahmed on Wed Mar 10, 2010 7:52 pm

    What's "U"?


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    Re: AS Physics

    Post by The Banker on Wed Mar 10, 2010 7:57 pm

    U is initial velocity...
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    Re: AS Physics

    Post by Ahmed on Wed Mar 10, 2010 8:05 pm

    R=(U^2Sin2Ѳ)/g


    Last question:

    Are you sure there is a 2 in front of the theta (Ѳ)?

    You actually need to use the double-angle formula? Surprised


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    Re: AS Physics

    Post by The Banker on Wed Mar 10, 2010 8:09 pm

    yah coz Sin2Ѳ = 2SinѲCosѲ
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    Re: AS Physics

    Post by Ahmed on Wed Mar 10, 2010 8:11 pm

    Yeah I know...

    Never saw that physics formula. But if its correct then plug in everything, and that gives you your answer...need help?


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    Re: AS Physics

    Post by The Banker on Wed Mar 10, 2010 8:17 pm

    nah i already did it..
    just doesn't look right slanty
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    Re: AS Physics

    Post by Ahmed on Wed Mar 10, 2010 8:25 pm

    Isn't this HW?


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    Re: AS Physics

    Post by The Banker on Wed Mar 10, 2010 8:27 pm

    emm yah
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    Re: AS Physics

    Post by Ahmed on Wed Mar 10, 2010 8:30 pm

    *shurg*

    Why are you caring that much lol? Ask him tomorrow.


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    Re: AS Physics

    Post by The Banker on Wed Mar 10, 2010 8:31 pm

    coz i don't like failing life Razz
    and how do u know he's a he not a she? Hilarious
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    Re: AS Physics

    Post by Ahmed on Wed Mar 10, 2010 8:34 pm

    A physics Q isn't your life man Hilarious

    Umm...men rule!


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    Re: AS Physics

    Post by The Banker on Wed Mar 10, 2010 8:36 pm

    i don't like failing in general...
    watch how i go all emo after i get my results tomoz... :S
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    and so true.. men do rule Hilarious
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    Re: AS Physics

    Post by Ahmed on Wed Mar 10, 2010 8:37 pm

    How in the world could you fail HW Hilarious ????

    Yup Very Happy


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    Re: AS Physics

    Post by The Banker on Wed Mar 10, 2010 8:39 pm

    by getting it all wrong Razz
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    Re: AS Physics

    Post by Ahmed on Wed Mar 10, 2010 8:58 pm

    So??

    HW is not even graded lol.


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    Re: AS Physics

    Post by The Banker on Thu Mar 11, 2010 6:37 pm

    Physics was an epic flop Hilarious
    i'm resitting...
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    Re: AS Physics

    Post by Ahmed on Thu Mar 11, 2010 7:56 pm

    Physics is soooooo easy it's not even funny.


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    Re: AS Physics

    Post by The Banker on Thu Mar 11, 2010 7:59 pm

    only 4 ppl in the year got grades man ( i was one of em Razz) and the rest of the year got Us..
    ur on ur own man... slanty

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