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16 August, 08:48

If a ball has a velocity of 15 m/s and a kinetic energy of 225 J, what is the mass of the ball?

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Answers (2)
  1. 16 August, 09:09
    0
    Answer: 2 kg.

    Explanation: Kinetic Energy is expressed as the product of mass and squared of velocity over two KE=1/2 mv². Derive the following expression for mass. m=2KE/v² then substitute the values 2 (225J) / (15 m/s) ² = 2kg
  2. 16 August, 09:09
    0
    Kinetic energy = 1/2 * m * v^2

    Kinetic energy = 225J

    Velocity v = 15m/s

    225 = 1/2 * m * 15^2

    225*2 = 225 * m

    450 = 225m

    m = 450/225

    m = 2kg

    Mass is 2kg
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