- #1
xzardaz
- 10
- 0
Hello , I have a very simple question :
Why do we mesure acceleration in [itex]\frac{m}{s^{2}}[/itex] ?
We all know that the speed is mesured in meters per second. This is very intuitive - it describes the speed as mevement of a point : how much distence ( in meters in the Si system ) the point travels per some amount of time ( seconds in Si ).
The acceleration is by definition the change of speed over time , so it is mesured in the mesurement unit of the speed per second.
So if we define a name for speed units , for example "louis" , such that 1 louis = 1 meter per second , we can mesure acceleration in louises per second. This is the same as ( meters per second ) per second.
I know , we can use math to simplify [itex]\frac{\frac{m}{s}}{s}[/itex] = [itex]\frac{m}{s^{2}}[/itex] and that's how it's done. But I wonder what gives us right to use math in this particular case , what is the phisical meaning of s2 ?
Why we don't mesure the acceleration in [itex]\frac{\frac{m}{s}}{s}[/itex] , instead - it have physical meaning for all variables ?
I know it is mathematicly the same , but I used to understand the sense of the physics mesure units , and now I don't see the logic of s2 ( It may have some meaning, but I don't see it ).
So why do we mesure acceleration in [itex]\frac{m}{s^{2}}[/itex] instead of [itex]\frac{\frac{m}{s}}{s}[/itex] ?
Why do we mesure acceleration in [itex]\frac{m}{s^{2}}[/itex] ?
We all know that the speed is mesured in meters per second. This is very intuitive - it describes the speed as mevement of a point : how much distence ( in meters in the Si system ) the point travels per some amount of time ( seconds in Si ).
The acceleration is by definition the change of speed over time , so it is mesured in the mesurement unit of the speed per second.
So if we define a name for speed units , for example "louis" , such that 1 louis = 1 meter per second , we can mesure acceleration in louises per second. This is the same as ( meters per second ) per second.
I know , we can use math to simplify [itex]\frac{\frac{m}{s}}{s}[/itex] = [itex]\frac{m}{s^{2}}[/itex] and that's how it's done. But I wonder what gives us right to use math in this particular case , what is the phisical meaning of s2 ?
Why we don't mesure the acceleration in [itex]\frac{\frac{m}{s}}{s}[/itex] , instead - it have physical meaning for all variables ?
I know it is mathematicly the same , but I used to understand the sense of the physics mesure units , and now I don't see the logic of s2 ( It may have some meaning, but I don't see it ).
So why do we mesure acceleration in [itex]\frac{m}{s^{2}}[/itex] instead of [itex]\frac{\frac{m}{s}}{s}[/itex] ?