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    Physics
    Grade-7
    Easy

    Question

    Direction : Calculate the missing term.
    m = 1500 g
    v = 100 m/s
    K.E. = ?

    1. 7500 J
    2. 7500000 J
    3. 750000 J
    4. 75000 J

    Hint:

    7500 J

    The correct answer is: 7500 J

      KE space equals space 1 half space mv squared equals space 1 half space cross times space fraction numerator 1500 space cross times space 100 squared over denominator 1000 end fraction equals space fraction numerator 1 over denominator up diagonal strike 2 end fraction space cross times space fraction numerator 15 over denominator up diagonal strike 10 end fraction space cross times space up diagonal strike 10000 with 500 on top end strike equals space 7500 space straight J

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