If you check the Wikipedia article "Physics equations", you'll find a LOT of equations. Too much trouble to copy them all here - and anyway, Answers.com has trouble formatting such things.
Probably all of them are "important" at some point or another. Whether they are important for you, specifically, will depend on what area you are working in (or studying). Fortunately, the equations in the Wikipedia are organized by topic.
understand of topics ( subjects).how can i do with equations.
There are no physics equations that go directly to lacrosse from physics.
This question definitely needs to be rephrased, there are countless physics equations.
Dimensional consistency is symbolic calculations that involves physical measurements. In physics equations, it is used in calculating the frequency.
"a" can represent (normally) acceleration.
No. A lot of physic has to do with equations and math. Physics will be easier if you are good at math. I was for me :)
In most equations, it stands for "energy"
Axiom
The equations of motions.
Scientific Law.
Theoretical physics is where physicists theorize about things not yet proved mainly by using equations or preexisting theories.
They are very important in many areas such as maths and physics. They are used to work out unknown's. For example in physics if you know the current through a circuit, and the total resistance, and you need to find out the voltage, you can use the equation: Voltage= current * resistance, to work out.