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26 August, 17:17

The kinetic energy of a car of mass 180kg moving at a constant velocity is 4410J. What is its velocity?

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  1. 26 August, 17:23
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    7m/s

    Explanation:

    Data obtained from the question include:

    K. E (kinetic energy) = 4410J

    m (mass) = 180kg

    V (velocity) = ?

    Kinetic energy is the energy an object possess while in motion. It is represented mathematically as:

    K. E = 1/2 mv^2

    With the above formula, we obtained the velocity the car as follow:

    K. E = 1/2mv^2

    4410 = 1/2 x 180 x v^2

    4410 = 90 x v^2

    Divide both side by 90

    v^2 = 4410/90

    v^2 = 49

    Take the square root of both side

    v = √49

    v = 7m/s

    Therefore, the velocity of the car is 7m/s
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