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.

1 answer

well, the height

y = 1000 - 10.0t - 4.9t^2

just find t when y=0.