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A soild wheel initially rotating at 50.0 rad/s comes to a uniform stop after 8.00 rotations.

Calculate the tangential accleration at the rim. Given that the angular acceleration is -24.9 rad/s^2.

I know its aT = r alpha but how do I get the radius?

  • physics -

    The intial velocity was 50rad/sec* radius. The acceleration is -24.9*r m/s^2

    vf^2=vi^2 + 2a*d

    0=2500r^2+ 2(-24.9)r*2PIr*8
    solve for r.

    check my thinking.

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