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20 April, 02:36

How much work must be done on a 20-kg go-cart to increase its speed from 5 m/s to 10 m/s?

a. 750 J

b. 250 J

c. 100 J

d. 1000 J

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Answers (2)
  1. 20 April, 02:58
    0
    750 J APEX Verified
  2. 20 April, 05:32
    0
    The answer is the change in kinetic energy

    K = 1/2 • mv^2

    Change in K = (1/2 • 20 • 10^2) - (1/2 • 20 • 5^2)

    Change in K = 1000 - 250 = 750J
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