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31 January, 04:57

Speed in a specific direction

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  1. 31 January, 06:39
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    Velocity a vector quantity, is the speed that has a specific direction.

    Examples:

    8 m/s to the East

    20000 km/h Northwest

    My car is running at a speed of 40 mi/h going North to my school.

    In the question it is already given that the football player is 80 kg.

    Then the mass of the football player = 80 kg

    Velocity at which the football player is running = 8 m/s

    Kinetic Energy = 0.5 • mass • square of velocity

    Now we have to put the known data in this equation to find the actual velocity of the footballer.

    So

    Kinetic Energy of the footballer = 0.5 * 80 * (8 * 8)

    = 0.5 * 80 * 64

    = 2560

    So the Kinetic energy of the footballer is 2560 joules
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