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15 January, 07:20

If you jump off a 7 m diving platform, how long will it take you to hit the

water?

A. 1.63 S

B. 1.88 S

C. 1.205

D. 1.45 s

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Answers (1)
  1. 15 January, 07:40
    0
    C.) T = 1.20s

    Explanation:

    From equation of motion,

    S = ut + ½gt²

    S = 7m

    g = 9.8m/s²

    U = 0m/s (since he starts from rest)

    t = ?

    S = ut + ½gt²

    7 = 0 * t + ½ * 9.8 * t²

    7 = 0 + 4.9t²

    t² = 7 / 4.9

    t² = 1.42857

    t = √ (1.42857)

    t = 1.195s

    t = 1.20s
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