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Homework Help: Find gravity on an unknown planet

  1. Feb 21, 2013 #1
    Starting from rest, an object is sliding down a frictionless inclined plane on the planet Org. Using the animation, determine the acceleration due to gravity ('g') on the planet. Use the protractor shown on the screen to measure the angle of inclination.
    View attachment 55979
    point 1: 0s 0,30
    point 2: 1s 2.6, 27.2
    point 3: 2s 10, 21.7
    point 4: 3s 22.7, 12.6
    point 5: 4s 40, 0
    Theta: 36.15

    Relevant Equations
    a=vf-vf
    a=gsinθ



    Attempt
    vi=0m/s
    vf=7.5m/s
    a=7.5m/s2

    g=sin36.15/7.5
    g=0.0787m/s2
     
  2. jcsd
  3. Feb 21, 2013 #2

    Simon Bridge

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    Science Advisor
    Homework Helper

    Please show your working and the reasoning behind it.

    Note:
    Invalid Attachment specified.
    You have a mistake in one of your equations.

    if a=7.5m/s2 and vi=0 as you have stated,
    then
    1. what is the speed after 1 second?
    2. does this agree with the data?
     
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