Problem Solving in Physics
Dawson High School Physics
The Problem Solving Philosophy
 Most formal methods for problem
solving share a few basic steps.
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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 from that model
that relates the knows 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.