Thought Questions

Open Ended Problems

1. Are the following systems stable or unstable (without intervention)?  Are the outcomes desirable without intervention?


a.  Inflation rate in the national economy?

b.  The infection rate for a contagious disease, for example, ebola.
c.  The supply of food for your country.











We know that physical systems that are unstable require control.


a. Discuss some physical systems that are unstable (without control).

b. For each item in (a) above, discuss whether automatic control is required or whether corrections by a person are adequate.