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30 December, 22:15

What is the kinetic energy K of the rotating wheel? Express your answer in terms of m, r, n, t, and π.

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  1. 30 December, 22:24
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    K = ((pi) ^2 * n^2 * m * r^2) / t^2

    Explanation:

    = (1/2) Iw^2

    I = moment of inertia = (1/2) mr^2

    w = angular speed = 2 (pi) n/t

    By substitution, we have

    K = ((pi) ^2 * n^2 * m * r^2) / t^2
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