An object falls freely from a height of 25 meters onto the root of building 5meters High. Calculate the velocity which the object str

Question

An object falls freely from a height of 25 meters onto the root of
building 5meters High. Calculate the velocity which the object strikes the root​

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Nem 4 years 2021-08-19T09:08:29+00:00 1 Answers 4 views 0

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  1. Acacia
    0
    2021-08-19T09:09:54+00:00
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    Answer:

    19.8m/s or 14√2 m/s

    Explanation:

    To find how fast something is going when it strikes the roof, we can use the equation √(2*g*height) where g=9.8 m/s^2 and the height is 20 meters as 25-5=20.

    Substituting in we get:

    \sqrt{2*9.8m/s^2*20}

    \sqrt{40*9.8m/s^2}

    \sqrt{392m/s^2}

    14\sqrt{2} m/s

    or19.8 m/s

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