SOLUTION: A tennis ball is launched straight upward with an initial velocity of 24.5 m/s from the edge of a cliff that is 117.6 meters above the ground. Which quadratic equation could be use

Algebra.Com
Question 1156901: A tennis ball is launched straight upward with an initial velocity of 24.5 m/s from the edge of a cliff that is 117.6 meters above the ground. Which quadratic equation could be used to correctly determine when the ball will hit the ground:
4.9t2 + 24.5t + 117.6 = 0
-4.9t2 - 24.5t + 117.6 = 0
-4.9t2 + 24.5t - 117.6 = 0
4.9t2 + 24.5t - 117.6 = 0
-4.9t2 + 24.5t + 117.6 = 0
Thank you
Answer by Edwin McCravy(20055)   (Show Source): You can put this solution on YOUR website!
The formula from physics is

h(t) = h0 + v0t - 4.9t2

v0 = initial velocity = 12.5 m/s
h0 = initial height = 117.6 m
h(t) = final height = 0 m

Substituting:

h(t) = h0 + v0t - 4.9t2

   0 = 117.6 + 24.5t - 4.9t2

Can you tell which one is equivalent to that?

Edwin
RELATED QUESTIONS

Solve step by step. 18.   A tennis ball is launched straight upward with an initial... (answered by ewatrrr)
A tennis ball is thrown vertically upward with an initial velocity of +6.9 m/s. What... (answered by richard1234)
A rocket is launched from atop a 101 - foot cliff with an initial velocity of 116... (answered by Alan3354)
A ball is thrown with an initial upward velocity of 5 m/s. What is its velocity after 1.5 (answered by ikleyn,solver91311)
A ball is thrown upward with an initial velocity of 80 feet per second from the edge of a (answered by ankor@dixie-net.com)
Show work please 10.    Work backwards to write a quadratic equation that will have (answered by josgarithmetic)
A tennis ball is launched upward at 32 feet per second from a platform that is 15 feet... (answered by lwsshak3)
A tennis ball is thrown vertically upward with an initial velocity of +7.4 m/s. What... (answered by Alan3354)
A ball is thrown up at the edge of a 376 foot cliff. The ball is thrown up with an... (answered by Alan3354)