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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​

Respuesta :

ssenboss21

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:

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

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

[tex]\sqrt{392m/s^2}[/tex]

[tex]14\sqrt{2} m/s[/tex]

or[tex]19.8 m/s[/tex]

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