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    The Question is....

    If v=4t-3t2​ and the body is at O initially,

    i) find a in terms of t
    ii) find s in terms of t
    iii) what is the value of t when the body next passes O?

    My Answers....

    i) a=4-6t
    ii) s=2t2-t3

    However part iii) has completely stumped me, can anyone help me!
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    (Original post by joem8197)
    The Question is....

    If v=4t-3t2​ and the body is at O initially,

    i) find a in terms of t
    ii) find s in terms of t
    iii) what is the value of t when the body next passes O?

    My Answers....

    i) a=4-6t
    ii) s=2t2-t3

    However part iii) has completely stumped me, can anyone help me!
    Well you have an equation for s, and you know the value of s when the body is at O...
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    Thanks for replying and I've tried using the equation for s but its probably just me but i don't know what the value for it while it is O
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    (Original post by joem8197)
    Thanks for replying and I've tried using the equation for s but its probably just me but i don't know what the value for it while it is O
    S = 0 at O
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    That's what i thought but somehow the answer in the back of the book is 2, how does that work?
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    (Original post by joem8197)
    That's what i thought but somehow the answer in the back of the book is 2, how does that work?
    Factorise the equation you have for s. Set s = 0 this will give you the answer the book gets.
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    Thanks!! I should of known that, i always forget to do that!
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    (Original post by joem8197)
    Thanks!! I should of known that, i always forget to do that!
    No problem
 
 
 
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