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13 January, 15:43

Cars A and B have the same mass, but Car A's speed is 15 mph, whereas Car B is moving at 60 mph. The kinetic energy

of Car B is:

times that of Car A

times that of Car A

2 times that of Car A

4 times that of Car A

16 times that of Car A

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Answers (1)
  1. 13 January, 18:40
    0
    16 times that of car A

    Explanation:

    Moving objects have kinetic energy which is calculated using the formula:

    E = (1/2) mv² where m is the mass of the object and v is its velocity.

    For car A, kinetic energy = 1/2*m*15²

    =112.5m ... i

    For car B, the kinetic energy = 1/2*m*60²

    =1800m ... ii

    dividing ii by i we get

    1800m/112.5m = 16.07

    Therefore The kinetic energy of car B is 16.07 times that of car A
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