Why does the unit of time enter twice in the unit of acceleration?

What is a good example of instantaneous speed

Hey student studies gravity using objects that have the same mass which two objects have the greatest gravitational force acting between them a. 100kg 1.0m 100kg b. 100kg 2.0m 100kg c. 100kg 2.0m 100kg big d. 100kg big 3.0m 100kg big

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island