Problema Solution
A ball is thrown upward from a height of 5ft with an initial upward velocity of 5ft/s. Use the formula h=-16t^2+vt+s to find how long it will take for the ball to hit the ground.
Answer provided by our tutors
s = 5 ft
v = 5 ft/s
t = the time we need to find
h(t)=-16t^2+5t+5
we need to find t>0 such that h(t) = 0
-16t^2+5t+5 = 0
by solving we find
t = 0.737 s
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the ball will hit the ground after 0.737 seconds.