Final answer:
Two examples of mechanical systems are a gas-filled piston involved in thermodynamics and a professor pushing a cart demonstrating Newton's second law. As a metaphor for micro and macroeconomics, an ecosystem or a traffic system could be considered, representing individual units and their collective interactions.
Step-by-step explanation:
A mechanical system includes various components that interact with each other primarily through forces and motion. Two examples of mechanical systems are:
- A piston filled with gas getting compressed or expanded, which illustrates the principles of thermodynamics as studied in Physics 2.
- A professor pushing a cart filled with demonstration equipment, involving the application of Newton's second law of motion where external forces, such as the professor's force and the frictional force from the floor, impact the acceleration of the system.
For the second question regarding a 'system' in the real world that serves as a metaphor for micro and macroeconomics, consider the following:
- An ecosystem, where individual species represent microeconomics and the entire ecosystem represents macroeconomics, showing interactions and dependencies at various levels.
- A traffic system, where individual cars can represent microeconomic entities while the entire traffic network can represent the macroeconomic overview, with traffic flow and congestion patterns reflecting economic trends and health.