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A hot-air balloonist, rising vertically ...

A hot-air balloonist, rising vertically with a constant velocity of magnitude `20 m s^(-1)`, releases a sandbag at an instant when the balloon is `25 m` above the ground . Afere it is released, the sandbag is in free fall. Skerch `a_(y)-t, v_(y)-t`, and `y-t` graphs for motion, taking origin at ground.
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