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March 26, 2017

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An electric motor rotating a workshop grinding wheel at a rate of 114 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 2.10 rad/s2.
(a) How long does it take for the grinding wheel to stop?

  • Physic - ,

    wf=0=wi+2at
    0=114*2PI/60 + 2(-2.10)t
    solve for time, t

  • Physic - ,

    6.09

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