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PHYICS

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a turn table is turing at a rate of 45 rad/sec and comes to rest after 5 second.how many rotation does it make before coming to rest?

  • PHYICS -

    average angular velocity during stop = 45/2 = 22.5 rad/sec
    so
    total angle = 22.5 rad/s * 5 s = 112.5 radians

    112.5 radians / 2 pi radians/revolution
    = 17.9 revolutions

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