PhysicsLAB NextTime Question
Freely-Falling Elevator

If you release a ball inside a freely-falling elevator it stays in front of you instead of "falling to the floor" because you, the ball, and the elevator are all accelerating downward at the same acceleration, g. If you similarly release a helium-filled balloon, the balloon will
 
        a) also stay in front of you
        b) press against the ceiling
        c) press against the floor
 
 

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