Some drops a ball off of the top of a 125-m-tall building. In this prob-lem, you will be solving for the time it takes the ball to hit the g

Question

Some drops a ball off of the top of a 125-m-tall building. In this prob-lem, you will be solving for the time it takes the ball to hit the ground.(a)Define your coordinate system, be thorough.(b)Write down the given infor-mation, be sure to include hidden information.(c)State what physics principleis at play here. How do you know this?(d)Select an equation.(e)Solve forthe time it takes for the ball to hit the ground.

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Edana Edana 3 years 2021-09-05T16:37:34+00:00 1 Answers 7 views 0

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  1. Ben
    0
    2021-09-05T16:39:28+00:00
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    Answer:

    t = 5.05 s

    Explanation:

    This is a kinetic problem.

    a) to solve it we must fix a reference system, let’s use a fixed system on the floor where the height is 0 m

    b) in this system the equations of motion are

                  y = v₀ t + ½ g t²

    where v₀ is the initial velocity that is v₀ = 0 and g is the acceleration of gravity that always points towards the center of the Earth

    e)    y = 0 + ½ g t²

         t = √ (2y / g)

         t = √(2 125 / 9.8)

         t = 5.05 s

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