Question 1061530
A coin is tossed downward with an initial velocity of 30 m/sec from an altitude of 75m. Approximately how long does it take the ball to reach the ground? use 4.9t^2+v0t=s
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Coin or ball, either way.
Use + for height and + for ascending.
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Use s(t) = -4.9t^2 + vot + h Where vo is + upward and negative downward & h = 75.
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s(t) = -4.9t^2 - 30t + 75 = 0
s(t) = 0 at impact
-4.9t^2 - 30t + 75 = 0
*[invoke solve_quadratic_equation -4.9,-30,75]
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Ignore the negative solution
t =~ 1.906 seconds