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Disk on a motion

  1. Apr 13, 2013 #1
    1. The problem statement, all variables and given/known data

    Adisk of radius R centred at the origin is placed on a frictionless x-y plane with origin as the centre of the disk.At t=0, the disk is given initial motion such that the point A(R,0) has velocity v towards
    +ve x axis and ω=v/2R. Find the coordinates of Point A at t= 4piR/v
    2. Relevant equations

    ∅=ωt..That's all i think is needed

    3. The attempt at a solution
    i used but i am getting a wrong answer help!
     
  2. jcsd
  3. Apr 13, 2013 #2

    mfb

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    Can you express the motion of A as functtion of the velocity of the center and ω?
    Based on that, can you calculate this velocity and ω?
     
  4. Apr 13, 2013 #3
    That's the problem..The velocity of A at t=0 is given..How can i relate to the centre of mass velocity..
     
  5. Apr 13, 2013 #4

    mfb

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    I proposed to start with the other direction (use w,ω for the center and calculate the motion of A as function of those variables) for a good reason - it is easier.
    Did you try to calculate it?
     
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