Question: During liftoff, a hot-air balloon accelerates upward at a rate of 3.0 m/s2. The balloonist drops an object over the side of the gondola when

During liftoff, a hot-air balloon accelerates upward at a rate of 3.0 m/s2. The balloonist drops an object over the side of the gondola when the speed is 15 m/s.
(a) What is the object’s acceleration after it is released (relative to the ground)?
(b) How long does it take to hit the ground?

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