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I have a problem in Edexcel AS Physics Unit 1 paper! watch

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    Can anyone help me in solving the 19th question (b) ii) part in Edexcel AS May 2015 Unit 1 Physics paper?
    (The link of the paper is attached below)

    http://files.physicsandmathstutor.co...%20A-level.pdf

    (PS: In marking scheme the answers were: 0.71 t, t/1.4, (root2/2)t, t/root2, root(1/2)
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    I dont see any screenshots
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    (Original post by lyamlim97)
    I dont see any screenshots
    Sorry there is a problem in attaching the screenshots. Can u check the 19th question in the link below?

    http://files.physicsandmathstutor.co...%20A-level.pdf
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    Could you show what you have tried and i will try to guide you towards the answer ?
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    (Original post by lyamlim97)
    Could you show what you have tried and i will try to guide you towards the answer ?
    I tried using the 4 equations of motion!
    This is the way I did using one of the equations.

    s=ut+1/2at^2

    since d=s/2 & a=5.63ms^-2 [the answer i got from (a)ii)]

    s/2=(0*t+1/2*5.63*t^2)/2
    s/2=1.4t^2 >>>ANSWER

    I am supposed to show in terms of t and this was my answer which is wrong! ( I have already showed the Marking scheme answers, u can compare)
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    (Original post by hkn)
    I tried using the 4 equations of motion!
    This is the way I did using one of the equations.

    s=ut+1/2at^2

    since d=s/2 & a=5.63ms^-2 [the answer i got from (a)ii)]

    s/2=(0*t+1/2*5.63*t^2)/2
    s/2=1.4t^2 >>>ANSWER

    I am supposed to show in terms of t and this was my answer which is wrong! ( I have already showed the Marking scheme answers, u can compare)
    So u have to get rid of s right ? What other equations or values can u use ?
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    (Original post by lyamlim97)
    So u have to get rid of s right ? What other equations or values can u use ?
    I have to get rid of 2nd power!

    S=(v+u)/2*t

    v=u+at

    v^2=u^2+2as
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    (Original post by hkn)
    I have to get rid of 2nd power!

    S=(v+u)/2*t

    v=u+at

    v^2=u^2+2as
    U can use the same equation again. Mayb just different values ? What else do you know. What is t ?
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    (Original post by lyamlim97)
    U can use the same equation again. Mayb just different values ? What else do you know. What is t ?
    t=time
    Plz check the link I sent !
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    (Original post by hkn)
    t=time
    Plz check the link I sent !
    t is the total time for s. U can create another equation using that and then sub it into t(s/2)
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    (Original post by lyamlim97)
    t is the total time for s. U can create another equation using that and then sub it into t(s/2)
    Thank u I will work on that
 
 
 
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