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13 October, 09:53

A 20-kg bicycle carrying a 50-kg girl is traveling at a speed of 8 m/s. What is the kinetic energy of the girl

and bicycle?

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Answers (1)
  1. 13 October, 10:19
    0
    The answer to your question is Ke = 2240 J

    Explanation:

    Data

    mass of the object = 20 kg

    mass of the girl = 50 kg

    speed = 8 m/s

    Kinetic energy = Ke = ?

    Formula

    Ke = 1/2 mv²

    Process

    Kinetic energy is due to the movement of an object.

    1. - Calculate the total mass

    Total mass = 20 + 50 = 70 kg

    2. - Substitution

    Ke = 1/2 (70) (8) ²

    3. - Simplification

    Ke = 1/2 (4480)

    4. - Result

    Ke = 2240 J
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