Homework Help: Physics

Posted by Jessica on Tuesday, October 4, 2011 at 5:22pm.

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?

Physics - Steve, Tuesday, October 4, 2011 at 5:39pm
s = 15 + 13.3t - 4.9t²

solve for s=0
Physics - Jessica, Tuesday, October 4, 2011 at 5:58pm
i dont get how to get rid of all the t's...
Physics - bobpursley, Tuesday, October 4, 2011 at 6:12pm
0=15+13.3t-4.9t^2

it is a quadratic equation, use the quadratic formula.

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