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16 September, 13:34

What is the total energy of a 850 kg sea plane flying at 38 m/s and 20 m above the ocean?

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  1. 16 September, 13:36
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    Answer: 7.8*10^5 J

    Explanation:

    Total energy = kinetic energy of plane + gravitational potential energy of plane.

    Total energy = ((1/2) * m*v²) + (m*g*h)

    Here, m is mass of plane, v is velocity of plane, g is acceleration due to gravity and h is height above the ocean.

    Now,

    Total energy = ((1/2) * m*v²) + (m*g*h)

    Total energy = m ((v²/2) + (g*h))

    Total energy = 850 ((38²/2) + (9.81*20))

    Total energy = 850 (722 + 196.2)

    Total energy = 7.8*10^5 J
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