A hot-air balloon is rising upward with a constant speed of 2.15 m/s. When the balloon is 2.90 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much...

A hot-air balloon is rising upward with a constant speed of 2.15 m/s. When the balloon is 2.90 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground? in sec.