A 4 kg object possesses 18 J of kinetic energy. What is its velocity?

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A 4 kg object possesses 18 J of kinetic energy. What is its velocity?

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Hải Đăng 4 years 2021-08-10T08:50:12+00:00 1 Answers 70 views 0

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  1. haidang
    0
    2021-08-10T08:51:47+00:00
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    Answer: 3 m/s

    Explanation:

    Mass of object = 4kg

    Velocity = ?

    Kinetic energy = 18J

    Recall that kinetic energy is the energy possessed by a moving object, and it depends on its mass M and velocity, V

    Thus, Kinetic energy = 1/2 x mv^2

    18J = 1/2 x 4kg x v^2

    18J = 0.5 x 4kg x v^2

    18J = 2kg x v^2

    v^2 = 18/2

    v^2 = 9

    v = √9 (square root of 9)

    v = 3 m/s

    Thus, the velocity is 3m/s

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