A student used a video camera to record another student dropping a marble through water ina graduated cylinder. The students watched the video in slow motion and made the observation shown below.

During which part or parts of the marble's fall did the marble experience unbalanced forces?

A. Part 1 only
B. Parts 1 and 2 only
C. Part 3 only
D. Parts 2 and 3 only ​

A student used a video camera to record another student dropping a marble through water ina graduated cylinder The students watched the video in slow motion and class=