SOLUTION: During the2008 Masters Tournament, Tiger Woods ball was projected upward with an initial velocity of 88ft/sec(vo=88). When will the ball be 120 ft above the ground?

Question 138363: During the2008 Masters Tournament, Tiger Woods ball was projected upward with an initial velocity of 88ft/sec(vo=88). When will the ball be 120 ft above the ground?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
During the2008 Masters Tournament, Tiger Woods ball was projected upward with an initial velocity of 88ft/sec(vo=88). When will the ball be 120 ft above the ground?
----------------
h(t) = -16t^2 + 88t
----------
Let the height be 120 and solve for "t":
-16t^2+88t = 120
-16t^2 + 88t - 120 = 0
-2t^2 + 11t - 15 = 0
----------
2t^2-11t+15 = 0
t = [11 +- sqrt(121 -4*2*15)]/4

t = [11 +- sqrt(1)]/4
t = 3 or t = 5/2
-------------------------
The ball will be at or above 120 feet between t= 2.5 seconds and 3 seconds
of its flight path time.
======================
Cheers,
Stan H.
RELATED QUESTIONS
Tiger Woods won $1,008,000 for his first place win of the Masters Tournament in 2001.... (answered by chitra)

An object is projected vertically upward with an initial velocity of Vo ft/sec, and its... (answered by stanbon)

A ball is thrown vertically upward from the ground with an initial velocity of... (answered by ikleyn)

A ball is projected directly upward from and initial height of 200 feet with an initial... (answered by jorel1380,ikleyn)

A soccer ball was hit and moved upward at a 50 degrees angle with an initial velocity of... (answered by mananth)

if an object is projected upward with an initial velocity off 64 ft per sec from a height (answered by jorel1380,lwsshak3)

A ball is thrown vertically upward from the ground with an initial velocity of 32ft/sec.... (answered by ikleyn)

A ball is thrown vertically upward from the ground with an initial velocity of... (answered by Alan3354)

Please help me solve this problem: If an object is projected upward with an initial... (answered by richwmiller)