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18 October, 13:15

An object is thrown straight up into the air at 10 m/s. how fast is the object traveling after 2 seconds?

a) 0

b) 5 m/s

c) - 5 m/s

d) - 10 m/s

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Answers (1)
  1. 18 October, 15:48
    0
    First write down all the known variables:

    vi = 10m/s

    t = 1

    a = - 9.8m/s^2

    vf = ?

    Now choose the kinematic equation to relate these variables:

    vf = vi + at

    vf = (10) + (-9.8) (1)

    vf = 0.2 m/s

    The speed of the object travelling after a second would be 0.2m/s in reality, however, it is closest to the choice A, which would suffice as the answer for your question.
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