the unit defining a value... such as a car goes 5 km/sec... why is km on top?
im learning physics.... and i dont understand which values belong on the numerator and denominator
such as km/sec.... or Amps/meters
so my question is WHAT makes a certain unit on top and what determins what goes on bottom
- PearlsawmeLv 71 decade agoFavorite Answer
Km/sec, Amps/meter, meter / second, meter/ second^2
kg / m^3, N/ m.
In all these units we have a symbol [/].
[/] means per.
Km/sec means kilometer per second.
Amps/meter means ampere per meter and so on.
When there is no number in front of these units we take the number as 1.
If there is a number, say, 12 km / s, then it is 12 km per second.
If we do want to say that a car moves 240 kilometers in 20 second,
We can write it in short form of 240 kilometer / 20 second
When 240 are divided by 20 we get 12.
Hence 240 kilometer / 20 second can be written is a simple way
Like 12 kilometers / 1 second.
Simply, we write 12 kilometers / second.
240 km / 12 second, 480 km/ 24 second, 120 km/ 10 second,
60 km/ 5s, all are one and the same and the simplest way of writing this is 12 km / 1 second and it is even simpler to write as 12 km / second.
- Anonymous1 decade ago
well it depends on what calculation it is, for example, 10 meters in 5 seconds, the velocity of the object is 10m/5s = 10/5 x m/s so it is 2 x m/s meaning
2 meters is covered in a second
just think about how you say it
"two meters PER second"
hope this clears it up a little
quite simple once you get it!