Homework Help: Physics

Posted by Ana on Monday, October 10, 2011 at 5:35pm.

A hot air balloon is traveling vertically upward at a constant speed of 3.9 m/s. When it is 20 m above the ground, a package is released from the balloon. After it is released, for how long is the package in the air? The acceleration of gravity is 9.8 m/s

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