Question

See the figure below. Which graph is the most appropriate to describe the height over time of a helium ballon that was accidentally let go and later burst?

Answer 1

Okay...................

Answer 2

D

Explanation:

We expect the height of a helium balloon to be increasing, up to the point where it bursts.

The only graph that shows consistently increasing altitude with a final drop is graph D.

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Additional comment

The graph of D shows the altitude increases at an increasing rate. The buoyancy force decreases with altitude, so we expect the balloon would actually have a decreasing rate of altitude increase. The actual curve would likely be concave downward.