Problem Solving in Physics Dawson High School Physics

The Problem Solving Philosophy Most formal methods for problem solving share a few basic steps. First, the problem must be identified. Next, a possible solution is proposed. Then, the solution is implemented. Finally, the solution is evaluated to see if it works. We can apply these steps to physics using the GUMMIES method.

Step One: Givens Write down what you know. Draw a diagram or picture. Write down the known variables as equations with their units. For example, vi= 2.0 m/s. Do the units match? (If not, convert) How many sig figs are in each known?

Step Two: Unknowns Write what you want to find out. Write down the unknown variable as an equation. For example, Dx = ? Identify what its units will be.

Step Three: Model and Method Decide on a plan to get the answer. Decide what model applies to the problem. Is it constant velocity, constant acceleration, etc.? Identify a formula or graph from that model that relates the knowns and unknowns. If more than one formula is required, make a plan of how you will use the formulas.

Step Four: Implementation Carry out your plan Rearrange the formula to solve for the unknown. Plug in the knowns and solve. Write the answer to the correct number of sig figs. Add correct units to the answer. The units should be apparent from the formulas used.

Step Five: Evaluate Solution Check your answer Put the answer in the original equation and see if it works. Ask if your answer makes sense. Check if your answer has the correct units.