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Homework Help: Radial and tangential acceleration

  1. Oct 16, 2008 #1
    1. The problem statement, all variables and given/known data
    A point on a rotating turntable 21.5 cm from the center accelerates from rest to a final speed of 0.800 m/s in 1.75 s. At t = 1.28 s, find the magnitude and direction of each of the following.

    2. Relevant equations
    (a) the radial acceleration

    (b) the tangential acceleration

    (c) the total acceleration of the point
    ? m/s^2, ? °

    3. The attempt at a solution
    for this i used the right equations for the give times and substituded V= 2pir/T but i didnt get the right answer. i used a_r= -v^2/r and a_t= d|v|/dt....can somebody explain it in a simple way...
  2. jcsd
  3. Oct 17, 2008 #2


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    Homework Helper

    Hi steph35,

    What numbers did you use, and what answers did you get for the three accelerations?
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