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    AS Physics

    The Banker
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    • Post n°1

    AS Physics Empty AS Physics

    Post by The Banker 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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    preid1220
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    • Post n°2

    AS Physics Empty Re: AS Physics

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

    lots of uncounted for variables there^
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    • Post n°3

    AS Physics Empty Re: AS Physics

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

    yah, air resistance is menna be neglected slanty
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    • Post n°4

    AS Physics Empty Re: AS Physics

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

    Shouldn't they give you an initial velocity?
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    • Post n°5

    AS Physics Empty Re: AS Physics

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

    thats what the question wants...
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    • Post n°6

    AS Physics Empty Re: AS Physics

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

    Oh! Ok shouldn't they give the Vx (initial horizontal velocity)?
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    • Post n°7

    AS Physics Empty Re: AS Physics

    Post by The Banker 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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    • Post n°8

    AS Physics Empty Re: AS Physics

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

    What's "U"?
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    • Post n°9

    AS Physics Empty Re: AS Physics

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

    U is initial velocity...
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    • Post n°10

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    Post by Ahmed 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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    • Post n°11

    AS Physics Empty Re: AS Physics

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

    yah coz Sin2Ѳ = 2SinѲCosѲ
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    • Post n°12

    AS Physics Empty Re: AS Physics

    Post by Ahmed 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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    • Post n°13

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

    nah i already did it..
    just doesn't look right slanty
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    • Post n°14

    AS Physics Empty Re: AS Physics

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

    Isn't this HW?
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    • Post n°15

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

    emm yah
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    • Post n°16

    AS Physics Empty Re: AS Physics

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

    *shurg*

    Why are you caring that much lol? Ask him tomorrow.
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    • Post n°17

    AS Physics Empty Re: AS Physics

    Post by The Banker 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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    • Post n°18

    AS Physics Empty Re: AS Physics

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

    A physics Q isn't your life man Hilarious

    Umm...men rule!
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    • Post n°19

    AS Physics Empty Re: AS Physics

    Post by The Banker 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
    ===
    and so true.. men do rule Hilarious
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    • Post n°20

    AS Physics Empty Re: AS Physics

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

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

    Yup Very Happy
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    • Post n°21

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

    by getting it all wrong Razz
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    • Post n°22

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

    So??

    HW is not even graded lol.
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    • Post n°23

    AS Physics Empty Re: AS Physics

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

    Physics was an epic flop Hilarious
    i'm resitting...
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    • Post n°24

    AS Physics Empty Re: AS Physics

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

    Physics is soooooo easy it's not even funny.
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    • Post n°25

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    Post by The Banker 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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