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OpenStudy (anonymous):
A girl throws a ball vertically at 10 m/s from a roof of a building 20 m high. (a.) How long will it take the ball to reach the ground? (b.) What will its velocity be when it strikes the ground?
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OpenStudy (anonymous):
So the ball goes up from the roof and then falls down?
OpenStudy (anonymous):
yes
OpenStudy (anonymous):
How do I solve this?
OpenStudy (anonymous):
h(t) = -4.9t^2 + 10t + 20 Factor this one...
OpenStudy (anonymous):
where did you get -4.9?
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OpenStudy (anonymous):
it can't be factored
OpenStudy (primeralph):
|dw:1374900019482:dw|
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