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9 January, 01:43

A 4.0 kg bird has 8.0 joules of kinetic energy how fast is it flying

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  1. 9 January, 01:53
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    Kinetic energy (KE) = 0.5*mass (m) * velocity (v) ²

    where KE = 8 J, m = 4 kg

    v² = KE / (0.5*m) = 8 / (0.5*4) = 4

    v = √4 = 2 m/s
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