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13 August, 08:29

A 5.22-kg object passes through the origin at time t = 0 such that its x component of velocity is 5.10 m/s and its y component of velocity is - 2.82 m/s. (a) what is the kinetic energy of the object at this time?

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  1. 13 August, 09:39
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    The magnitude of the object's velocity is

    √ (5.1² + 2.82²) = √ (33.9624) = 5.828 m/s.

    Kinetic energy = (1/2) (M) (speed²)

    = (1/2) (5.22 kg) (5.828 m/s) ²

    = (2.61 kg) (33.9624 m²/s²)

    = 88.64 kg-m²/s²

    = 88.64 Joules
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