|How do you find the right formula in any problem?|
|Question Date: 2017-05-17|
This is an interesting question, and is very
problem dependent. However, there are a few things
to keep in mind when problem solving. The first
is to consider what variables you are given, and
what variable(s) you are trying to solve for.
The next thing to consider is what equations
you have available to you and how the variables in
those equations match up to the variables that you
are considering in your problem. Can you
find an equation which consists of all of the
variables you are using, without any extraneous
variables to consider? Or can you find a
couple of equations which you can combine to get
the same effect If so, take that equation, and
then manipulate it algebraically to obtain an
equation which has the variable you are solving
for on the left side, followed by an "equals"
sign, followed by an expression! I hope this
This is a really broad question. I think there is
no easy answer that can apply to all. I do think
there are probably some ingredients (maybe not a
complete list) that can be helpful:
a) Never stop learning. I mean not just
books. You can learn from everywhere, classroom,
internet, friends, people, ...etc. This would
serve as the basics.
b) Critical thinking. Some problems may look
tacky, but once you understand the essence, they
won't be that scary anymore.
c) Communicating. Just like that you are asking
questions here. You may get the good solutions
from another experienced person. There are many
other resources that you can turn to. Don't try to
solve all problems by your own.
There's no simple answer for finding the
right formula in any problem. Learning and
thinking are the only answers I know. I sent your
question to my brother who used to teach math in
high school and college. I asked him if he had
any words of wisdom. If he has an answer, I'll
send it along.
That's a question you can work on for the rest
of your life!
One of the hardest part of moving up levels in
school is the sheer amount of formula
and equations you need to know. This gets really
stressful; however, there is some
ways to solving problems easily.
First, try to
understand what you are reading. Then,
try to find clues to what you are solving.
instance, if a word problem states how long something
is, you know the answer needs to be some
meaurement such as meters, instead of grams (as
grams is talking
about an amount rather than the height of
something). Also, look for certain key words such
as "average" or the "probabilty of",
which can further help you know which formulas to
Know that there are a lot of formulas, but
most of the formulas are actually
derived by a simple formula.
I guess a more simple way to knowing which
formulas to use is A LOT of practice!
do a problem, keep trying to make
a connection with the formula to the problems. As
you get more and more used to the formulas with
the problem, you will get
better connecting problems to formulas.
Physics has equations that describe the various
elements in nature. The trick in doing most
physics problems is figuring out what the various
terms in each of these equations are. It's
basically a word problem. What you want to do is
to narrow down the list of equations and the list
of unknowns until the number of unknowns is less
than or equal to the number of equations. Solving
it at that point becomes just an algebra problem.
That’s a great question. Formulas are
incredibly important in science, and though it may
seem like there are a lot, they are all related in
some way! Formulas depend on variables, or
things that can change like time and distance.
My advice to you is to write down all of your
variables as you read the question, and
then look for formulas that contain the variables
you have and the variable that you are missing!
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