A flywheel turns through 60 rev as it slows from an angular speed of 2.8 rad/s to a stop.
How much time is required for it to complete the first 30 of the 60 revolutions?

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  1. ave speed = 1.4 rad/s

    stop time = 2 * π * 60 / 1.4

    acceleration = 2.8 rad/s / stop time
    ... negative ... wheel is stopping

    30 * 2 * π = 1/2 a t^2 + 2.8 t
    ... solve for t

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  3. blaaaaaaaaaaaaaaaaaaaaaaahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

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