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13 January, 23:58

How much time does it take a skater to increase her speed uniformly, from 3.0 meters per second to 7.0 meters

per second, over a distance of 10 meters?

a. 1.0 S

b. 4.0 s

C 6.0 s

d. 2.0 s

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Answers (1)
  1. 14 January, 02:39
    0
    d. 2.0 s

    Explanation:

    Given:

    v₀ = 3.0 m/s

    v = 7.0 m/s

    Δx = 10 m

    Find: t

    Δx = ½ (v + v₀) t

    (10 m) = ½ (7.0 m/s + 3.0 m/s) t

    t = 2.0 s
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