A stone is released from a balloon rising vertically with constant speed u. Neglect air resistance. Which statements are correct?
Select all that apply

Question

A stone is released from a balloon rising vertically with constant speed u. Neglect air resistance. Which statements are correct?

G1 Physics · Accepted Answer

At release, the stone retains the balloon's instantaneous upward velocity u. It then moves under acceleration −g. Additional rise: H=u²/(2g). The balloon has zero acceleration, so the stone's relative acceleration with respect to it is −g. For the stone to return to the release level: 0 = ut − gt²/2, giving the non-zero root t=2u/g. Thus all statements are correct.