Standing on the surface of the Earth you drop a rock down a well and it falls for 5 seconds before hitting the bottom. How fast is it moving

Question

Standing on the surface of the Earth you drop a rock down a well and it falls for 5 seconds before hitting the bottom. How fast is it moving when it hits the bottom of the well

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Eirian 4 years 2021-08-26T09:27:54+00:00 2 Answers 8 views 0

Answers ( )

  1. thuthao
    0
    2021-08-26T09:29:03+00:00
    Reply

    Answer:

    it was moving at 50m/s when it hits the well bottom

    Explanation:

    Using Newton first law of motion;

    V=u+gt

    v=final velocity (what we are about to calculate)

    u=initial velocity which is 0

    g= acceleration due to gravity 10m/s^2(since its expressing free fall it will be       positive)

    t=time taken 5seconds

    v=0+10(5)

    v=50m/s

  2. Delwyn
    0
    2021-08-26T09:29:04+00:00
    Reply

    Answer:

    49 m/s.

    Explanation:

    Given:

    Time, t = 5 s

    Vo = 0 m/s

    a = 9.8 m/s2

    Using equations of motion,

    Vf = Vo + at

    Vf = 0 + 9.8 × 5

    = 49 m/s.

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