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Homework Help: Displacement of an object in circular motion

  1. May 16, 2012 #1
    1. The problem statement, all variables and given/known data
    A1. An object undergoing circular motion is pictured below at time t = 0 s.
    (a) What is the angular frequency of the object?
    (b) What is the equation of the displacement of the object in the x-direction?
    (c) What is the equation of the displacement of the object in the y-direction?
    (d) What is the y-displacement of the object at t = 0 s?
    (e) What is the first time after t = 0 s that y = 0?

    I cant put the diagram on here but its a circle on x/y axis with the object in the lower right quadrant where θ=45° and v=2m/s and the r=2m

    2. Relevant equations
    T=2∏r/v
    ω=2∏/T
    x=Acos(ωT+δ)

    3. The attempt at a solution
    Ive managed to do part (a) using the equations above and got 1rad/s
    However im not sure on the rest, i was thinking of using x=Acos(ωT+δ) but im not sure how

    cheers for any advice
     
  2. jcsd
  3. May 16, 2012 #2

    gneill

    User Avatar

    Staff: Mentor

    Yes, carry on with that. What values do you ascribe to ω and δ? What equation will you write for y(t)?
     
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