During cytokinesis, the cytoplasm of the cell is divided in half, and the cell membrane grows to enclose each cell, forming two separate cells as a result. The end result of mitosis and cytokinesis is two genetically identical cells where only one cell existed before.
The rock it traveling really, really fast. It is hard to exactly determine how fast bc u need the height of the cliff and how big the rock is. Hope this helps and can I get brainliest answer!