Asked by ted
A professional stunt performer at a theme park dives off a tower 21metres high into the water. His height above the ground at time tseconds is given by the equation h=-4.9t^2+21
a. How long does it take to reach the halfway mark?
a. How long does it take to reach the halfway mark?
Answers
Answered by
drwls
Solve the equation
10.5 = -4.9 t^2 + 21
which can be rewritten
t^2 = 10.5/4.9 = 2.14 s^2
t = sqrt2.14 = ___ s
10.5 = -4.9 t^2 + 21
which can be rewritten
t^2 = 10.5/4.9 = 2.14 s^2
t = sqrt2.14 = ___ s
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