# Homework Help: Quick Notation Question

1. Sep 14, 2006

### Sisyphus

$$V_{x} \equiv \Delta x / \Delta t$$

What is the difference between $$\equiv$$ and = ?

I know that it means congruency in math but I somehow doubt that it's the case in this situation :P

2. Sep 14, 2006

### Arkronus

there's no difference, it just means average velocity is equal to change of distance divided by change of time.

3. Sep 14, 2006

### Sisyphus

i figured as much...

is there a reason for this convention? (the textbook uses both throughout)

4. Sep 14, 2006

### Arkronus

not sure, maybe the extra line on the equal sign just means that it's not just a number answer but also with units.

5. Sep 14, 2006

### Sisyphus

I see

well, thanks for the quick response!

6. Sep 14, 2006

### Integral

Staff Emeritus
It is usually used to denote a definition. So your statement is a definition of Vx

7. Sep 14, 2006