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8 March, 04:41

How much work must be done on a 5-kg sled to increase its speed from 10

m/s to 15 m/s?

A. 25

B. 312.5 J

C. 562.5 J

D. 5

+5
Answers (1)
  1. 8 March, 07:23
    0
    B. 312.5 J

    Explanation:

    Work = change in energy

    W = ½ mv₂² - ½ mv₁²

    W = ½ m (v₂² - v₁²)

    W = ½ (5 kg) ((15 m/s) ² - (10 m/s) ²)

    W = 312.5 J
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