Question

A hot air balloon is rising at a constant velocity of 13.3 m/s. When the balloon is at a height of 15 m, a heavy object is dropped overboard. IF air resistance on the object is neglected, how long does it take for it to reach the ground?

Answer 1

s = 15 + 13.3t - 4.9t²

solve for s=0

Answer 2

i don't get how to get rid of all the t's...

Answer 3

0=15+13.3t-4.9t^2

it is a quadratic equation, use the quadratic formula.