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16 January, 13:36

A supply bag is dropped from a rescue plane. After the bag falls for 3.2 seconds, what is the velocity of the bag?

How far has the bag fallen?

I know the answer to the first one is - 19.6 but im struggling to figure out the second

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Answers (1)
  1. 16 January, 13:46
    0
    -31.4 m/s

    50.2 m

    Explanation:

    Given:

    x₀ = 0 m

    v₀ = 0 m/s

    t = 3.2 s

    a = - 9.8 m/s²

    Find: v and x

    v = at + v₀

    v = (-9.8 m/s²) (3.2 s) + 0 m/s

    v = - 31.36 m/s

    x = x₀ + v₀ t + ½ at²

    x = 0 m + (0 m/s) (3.2 s) + ½ (-9.8 m/s²) (3.2 s) ²

    x = - 50.176 m

    Rounding, the bag reaches a velocity of - 31.4 m/s after falling a distance of 50.2 m.
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