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Can you check my physics homework please?

  1. Nov 9, 2013 #1
    Can you check my physics homework please??

    1. The problem statement, all variables and given/known data
    My physics project includes predicting
    (1) the time it takes a ball to go down a slide
    http://i.imgur.com/TfQI87H.png
    I'm not sure if it's right though.

    (2) finding the coefficient of friction between me and the slide.
    http://i.imgur.com/3P8FPOe.png

    Calculations should be correct for the most part, I'm just not sure if I'm doing stuff right. Particularly, I'm not sure about where it goes ff = fa - fnet because then i found the coefficient to be like .4 and that seems really little considering how the differences in times were a lot more.
     
  2. jcsd
  3. Nov 9, 2013 #2

    haruspex

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    You need to post the actual questions, preferably word-for-word.
     
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