anonymous
  • anonymous
for newton's laws, do you refer to acceleration as m/s^2 or N/kg?
Physics
  • Stacey Warren - Expert brainly.com
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schrodinger
  • schrodinger
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anonymous
  • anonymous
don't you use N/kg for gravity also?
anonymous
  • anonymous
yes gravity is just a special type of acceleration.
anonymous
  • anonymous
so in newton's laws, you go for a=N/kg instead the m/s^2?

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anonymous
  • anonymous
yes because m/s^2 is just units. whereas N/kg is actually a variable representation of acceleration.
anonymous
  • anonymous
is 1 N/kg equal to 1 m/s^2?
anonymous
  • anonymous
wait actually I'm sorry for some reason I was thinking F/m. both are units that mean the same thing.
anonymous
  • anonymous
so really use can use either to represent accleration, but typically we use m/s^2 to represent acceleration.
anonymous
  • anonymous
For Newtons second law the units would be m/s^2
anonymous
  • anonymous
is this for a homework question or are you just trying to understand units better?
anonymous
  • anonymous
understanding the units, because im not sure what units to put after i find the acceleration?
anonymous
  • anonymous
use m/s^2
anonymous
  • anonymous
N/kg is odd, butt yes it means the same thing.
anonymous
  • anonymous
think about velocities unites, we use m/s for velocity, so to keep it consistent use m/s^2 for acceleration.
anonymous
  • anonymous
alright!thank you and do you know what 1 newton is equivalent to?:s
anonymous
  • anonymous
yes one newton = (kgm)/s^2
anonymous
  • anonymous
okay thanks alot!
anonymous
  • anonymous
no problem.
anonymous
  • anonymous
See if you look at g as acceleration due to gravity.. then you normally use m/s^2.. cause even if its acceleration due to gravity.. its none the less acceleration and that has to be its SI units.. However.. there is another TOTALLY DIFFERENT way to look at g.. and that is called as gravitational field intensity.. .meaning.. how strong is the field of gravity due to earth (or for that matter any mass).. when you mean THAT way.. you usually say g = N/kg.. meaning you are saying.. how much force a UNIT mass would experience in a gravitational field... so bottom line if i said g = 9.8m/s^2... it basically says how much acceleration i would get at that point .. if i said g = 9.8 N/kg.. it means how much force is experienced by a unit mass kept at that point.. so even though they have the same physical dimensions.. they are two VERY different concepts!! and hence we use those different units!
Vincent-Lyon.Fr
  • Vincent-Lyon.Fr
First thing: there is no difference between N/kg and m/s², so both are ok. Acceleration is a kinematic concept in the first place. So it is more logical to use m/s² Even if N's 2nd law did not exist, and the unit newton had not been defined, you could still work with accelerations in m/s². When you first encounter g, it is seen as the ratio of a force by a mass as you hang a mass on a spring, so it is logical to use N/kg to define it. But then you realise an object in free fall has an acceleration equal to g as well, and then the natural unit becomes m/s². It is the same with other quantities, and it is sometimes a cultural point of view. In France, all electric fields are given in V/m, but I think I have seen a different (but same) unit on this forum, though I cannot remember which one it was, maybe N/C.

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