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Help with Edexcel M1 (Review Exercise 1) watch

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    (Original post by Muttley79)
    Using the 240 is correct:

    240 = 20/(3f) + time at constant vel + 20/f

    then get an expression in terms of f.

    Now find the area under the graph - two trapezia plus a rectangle (using the values in terms of f)

    Now we add the three areas to get 4000 and you should be able to get f.
    Ohhhhhhhh so you get 240 from the others oh I see
    So you rearrange and/or collect and get 40t = 1600
    so t = 40.

    f = 20/3t therefore it is 20/120 which is 1/6ms^-2.

    I see, I see I see.

    THANK YOU VERY MUCH
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    (Original post by AlphaArgonian)
    Hello, so my teacher assigned me to do the first 30 questions of the review exercise and funnily enough Q30 is the one question I just don't understand. I've looked at physicsandmathstutor.com and I still don't understand. The discs don't work on W10 and my friend who did them before the end of term on Friday asked the teacher but still doesn't fully understand the question.

    Thanks.
    Here.
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    (Original post by MathsAstronomy12)
    Here.
    Remove your answer - we don't post full solutions
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    (Original post by MathsAstronomy12)
    Here.
    Thanks
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    (Original post by Muttley79)
    Remove your answer - we don't post full solutions
    Method mate and he knew the solutions anyway
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    (Original post by Muttley79)
    Remove your answer - we don't post full solutions
    With respect, may I ask why?
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    (Original post by AlphaArgonian)
    With respect, may I ask why?
    It's one of the suggestions in the maths forum

    It's much better for your learning to work it out from hints - which is what you did
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    (Original post by MathsAstronomy12)
    Method mate and he knew the solutions anyway
    Read the rules on the maths forum - you don't help people but posting a full method.
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    (Original post by Muttley79)
    It's one of the suggestions in the maths forum

    It's much better for your learning to work it out from hints - which is what you did
    That's what my teachers say but I was unsure about it. Well you're right.

    AND THANKS AGAIN FOR THE HELP
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    (Original post by Muttley79)
    Read the rules on the maths forum - you don't help people but posting a full method.
    Hahaa it's like I'm talking to my teacher. Won't do it again, sir.
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    (Original post by AlphaArgonian)
    That's what my teachers say but I was unsure about it. Well you're right.

    AND THANKS AGAIN FOR THE HELP
    Well done for sorting it out in the end
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    (Original post by MathsAstronomy12)
    Hahaa it's like I'm talking to my teacher. Won't do it again, sir.
    Well I am a maths teacher - but female
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    (Original post by Muttley79)
    Well I am a maths teacher - but female
    Apologies, Ms Muttley
 
 
 
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