A soccer ball with a mass of 0.45 kg is kicked and is moving at 8.9 m/s. Find the kinetic energy of the ball.

Question

A soccer ball with a mass of 0.45 kg is kicked and is moving at 8.9 m/s. Find the kinetic
energy of the ball.

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Thu Nguyệt 5 years 2021-08-31T09:44:20+00:00 1 Answers 12 views 0

Answers ( )

  1. diemthu
    0
    2021-08-31T09:45:57+00:00
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    Answer:

    17.82J

    Explanation:

    Kinetic energy = 1/2 mv^2

    Given

    Mass M = 0.45kg

    Velocity v = 8.9m/s

    Therefore,

    K.E. = 1/2 x 0.45 x (8.9)^2

    = 1/2 x 0.45 x (8.9 x 8.9)

    = 1/2 x 0.45 x 79.21

    Multiply through

    = 35.6445/2

    = 17.82J

    The kinetic energy of the ball is 17.82J

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