Adventures
in Problem Solving
1) Relax and slowly
read the problem.
You should relax. These problems
were not formulated to trick you. Put the problem in
context and try to relate to what the problem encompasses.
2) What is the unknown
value that you must find in this problem?
Focus your attention on what value
the problem wants you to determine. Make a guess
at the answer! Knowing the approximate value will give
you confidence in your journey.
3) What are the known
values that the problem gives you?
Look to see what values the problem
has given you to determine the known value.
Are there any other known values that you can use?
4) Draw a diagram. Label the known
values and implied values in the problem.
Drawing a diagram is essential
and fun. Accurate diagramming skills will lead you along
the right path in future problem solving. You will begin
to connect known values with parts of the diagram. Drawing
a diagram will help you understand the physical principles
involved. List the known values in a tabular form. This
will help you in determining which equation to use.
5) Write down a few equations that include the
known values and
the
unknown value given in the problem.
Write down a few equations that
you think will help you. Don't look for the right
equation. Looking
for the right equation will deny you a rich understanding
of this problem and future problems. There may be more
than one way to solve the problem. Discovering dead-ends
are as important as finding the right path to your solution.
6) You may first have to solve an intermediate
equation to obtain a value needed for
the main equation. Then, solve the main equation for
the unknown value.
Many solutions will involve solving
for an intermediate value that must be used to solve
for the one equation that will get the unknown value
called for in the problem. That's why you want to have
more equations written down than you think you need.
Making connections between the equations and the given
values requires that you look at the whole puzzle.
There is more than one path to completing any puzzle
7) Check your answer. Does your answer
make sense?
If you found the distance to the
Sun from the Earth to be 1.5 x 10^5 meters,
ask yourself if this is correct!