The branch of mechanics that is concerned with the effects of forces on the motion of objects.
"The professor explained how dynamics predicts exactly how a car will accelerate when the engine applies force to its wheels."
In plain English: Dynamics refers to how different parts of something interact and change over time.
"The team's success depended on the strong dynamics between its members."
Usage: In everyday conversation, dynamics refers to the way different elements interact within a group or situation rather than physical forces. Use this term when describing how people influence each other in a team or how various factors affect an outcome.
The word dynamics comes from combining dynamic with the suffix -ics. It entered English to denote the study of forces and their effects on motion, building directly on the meaning of its root.