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16 January, 14:46

M=2450kg

V=72km/h

Ek=?

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Answers (1)
  1. 16 January, 17:23
    0
    490,000J

    Explanation:

    Mass (M) = 2450kg

    Velocity (V) = 72km/h

    Converting from km/h to m/s:

    (72km) * (1000m) * (1h) / (3600s) * (1km) (1h)

    Km and h cancel out:

    V = 20m/s

    Kinetic energy (Ek) = ?

    Ek=1/2MV^2

    Ek=1/2 * (2450kg) * (20m/s) ^2

    Ek=490,000J
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