physics

A high-speed drill rotating ccw at 2300 rpm comes to a halt in 2.9 s .

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  1. you do not say what the question is

    average rpm during stop = 1150

    turns to stop = 1150 *2.9/60

    original radians/s
    = 2300 revs/min*2 pi rad/rev *1min/60 s

    = 241 radians/s
    angular acceleration = -241/2.9

    whatever

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