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3 September, 20:21

6. Rank the following in terms of increasing kinetic energy:

A. A 1200 kg car going 15 m/s

B. A 10,000 kg train car at rest

C. A 15 kg meteor going at a speed of 1000 m/s

D. A 100 kg person running at 5 m/s

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Answers (2)
  1. 3 September, 20:22
    0
    I'm doing dis greatest to least

    1. C

    2. A

    3. D

    4. B
  2. 3 September, 20:28
    0
    B < D < A < C

    Explanation:

    Kinetic energy depends on the mass and the square of the velocity of the body. A body in motion has kinetic energy.

    A. m = 12000 kg

    v = 15 m/s

    K. E. = 0.5 mv²

    = 0.5 (12000 kg) (15 m/s) ²

    = 1,350,000 J

    B. m = 10,000 kg

    v = 0

    K. E. = 0 J

    C. m = 15 kg

    v = 1000 m/s

    K. E.=0.5 mv²

    = 0.5 (15 kg) (1000 m/s) ²

    = 7,500,000 J

    D. m = 100 kg

    v = 5 m/s

    K. E.=0.5 mv²

    = 0.5 (100 kg) (5 m/s) ²

    = 250 J

    In increasing order of kinetic energy:

    B < D < A < C
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