A ball is dropped from a height of 23.5 meters. Assuming no air resistance, how many seconds will it take the ball to hit the ground?<

Question

A ball is dropped from a height of 23.5 meters. Assuming no air resistance, how many seconds will it take the ball to hit the
ground?

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Helga 4 years 2021-08-26T12:52:00+00:00 2 Answers 10 views 0

Answers ( )

  1. binhan
    0
    2021-08-26T12:53:10+00:00
    Reply

    It will attain a speed of 20m/s before touching the ground, but the time taken to reach the ground is 2 seconds. Because the velocity is not uniform but acceleration/gravity is. Therefore, the answer to your question is: 2 seconds.

  2. Farah
    0
    2021-08-26T12:53:58+00:00
    Reply

    Answer:

    About 2.19 seconds

    Explanation:

    d=v_ot+\dfrac{1}{2}at^2

    Since the ball is dropped from rest, there is no initial velocity, and you can write the following equation:

    23.5=\dfrac{1}{2}(9.8)t^2 \\\\t^2\approx 4.79 \\\\t\approx 2.19s

    Hope this helps!

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