A ball is released from a hot air balloon moving downward with a velocity of
-10.0 meters/second and a height of 1,000 meters. How long did it take the ball to reach the surface of Earth? Given: g = -9.8 meters/second2.
h = Vo*t + 0.5g*t^2 = 1000 m.
10t + 4.9t^2 - 1000 = 0
Use Quadratic Formula and get:
t = 13.3 s.