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Alla [95]
3 years ago
6

An object falls freely from a height of 25 meters onto the root of

Physics
1 answer:
Tamiku [17]3 years ago
5 0

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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