PROBLEM SOLVING STRATEGY

The benefits of using a problem-solving strategy:

 It provides a consistent methodology that can be used for all problems.  Its application shows the generality of problem solving as an activity.  It is an excellent means by which problem solvers can overcome the initial panic of “how can I ever solve that?’  It answers the question “What do I do next?”  It slows the process down: usually this helps make the problem solver be more accurate and methodical.  It provides a starting structure for identifying the parts of the problem.

Be WISE

WHAT’S HAPPENING Physical Principle Identify the basic physical principles involved in the problem. Construct a conceptual picture of the problem before you attempt to write equations.

Diagram Draw a sketch or diagram. Be reasonably accurate. It may lead to relationships that are not obvious when reading only the words.

Known and Unknowns Identify and label what is given and what is required, using appropriate units.

ISOLATE THE UNKNOWN

Select an Equation Identify an equation that will enable you to solve for the unknown. This first equation should contain the unknown.

Solve Symbolically Using only the symbols, solve for the unknown.

Search Systematically If one equation is not enough, then use the basic physical principles to identify other equations to solve simultaneously.

SUBSTITUTE Plug in both the numbers and the units.

EVALUATE Are the sign, magnitude, and units correct: Compare with your diagram, intuition, and knowledge. Does the answer make sense? If you like your answer, place a check mark beside it.