SOLUTION: A ball is tossed into the air from a height of 12 feet at 16 ft/sec. How long does it take to reach the earth?
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Question 330197
:
A ball is tossed into the air from a height of 12 feet at 16 ft/sec. How long does it take to reach the earth?
Answer by
solver91311(24713)
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):
You can
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Height as a function of time for a projectile propelled straight up near the Earth's surface is given by:
Your problem gives initial velocity:
ft/sec.
Your problem gives initial height:
ft.
You want to determine the value of
when
and
.
Simply solve the quadratic equation:
And discard the negative root.
Super Double Plus Special Extra Credit
Interpret the meaning of the negative root to the equation and explain why it needs to be discarded.
John
My calculator said it, I believe it, that settles it
