Question

The study of fluids in motion is called ____.

Answer 1

1. A substance which has the tendency to flow is called a fluid.
2. All liquids and gases are fluids.
3. Fluid mechanics is the study of the behavior of fluids at rest and in motion.
4. A subdiscipline of fluid mechanics, fluid dynamics is concerned with the study of fluids in motion.

Thus, the study of fluids in motion is called fluid dynamics.