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How high should you be if you want to drop a tennis ball and have it hit the ground with a velocity of -25.0 mi/hr?

How High Should You Be If You Want To Drop A Tennis Ball And Have It Hit The Ground With A Velocity Of 250 Mihr class=
How High Should You Be If You Want To Drop A Tennis Ball And Have It Hit The Ground With A Velocity Of 250 Mihr class=

Sagot :

Data: Final velocity = 11.176m/s (or 25 mi/hr)

Firstly, we need to replace our values on the third given equation. It is convenient to use all the values on their SI units.

[tex]11.176^2=0^2-2*9.81*\Delta x\Rightarrow\Delta x=\frac{11.176^2}{-2*9.81}=-6.366m[/tex]

Thus, the ball would need to be dropped from a height of 6.366m, or 20.89ft

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