What the heck is measured in m2 / s2?

[johann1301]

What the heck is measured in m2 / s2??

Can somebody tell me what m2 / s2 measures?? A square meter per squared second??

 

[sophiecentaur]

The rate of change in the growth of an area?

 

[dacruick]

energy per unit mass!

 

[Black Integra]

what ever.
I ain't even important.

 

[russ_watters]

Measured? Nothing. But I suspect the question is really asking about what an energy equation means.

 

[rcgldr]

My guess is that it's the velocity component for 1 Joule of energy, 1 Joule = 1 kg m² / s ², or kinetic energy of an object = 1/2 mass v² (with v² stated as m² / s² ). ... or it could be related to centripetal acceleration, a = v² / r.

 

[Andrew Mason]

Measured? Nothing. But I suspect the question is really asking about what an energy equation means.

Well, it could be a measure of energy per unit mass (above post #3): J/kg = Nm/kg = kg m sec^-2 m kg^-1 = m^2/sec^2

AM

 

[dacruick]

Well, it could be a measure of energy per unit mass: J/kg = Nm/kg = kg m sec^-2 m kg^-1 = m^2/sec^2

AM

energy per unit mass!

mwahahaha

 

[Zimmah]

i'm sorry for necrobumping this old tread, but AM is actually right.

Using bernoulli's equations you can find out the loss of energy due to friction in joule/kg, which is the same as m2/s2.

A joule is the same as a Newton times meter, while a Newton is the force required to accelerate a mass of 1 kg by 1 meter per second squared. so if you write it out it becomes:

\frac{J}{kg} = \frac{N*m}{kg} = \frac{kg*m*m}{s²*kg} =\frac{m²}{s²}

so m2/s2 could refer to the loss of energy per kg due to friction. It's used mostly in hydrodynamics and aerodynamics. Probably also in thermodynamics.

 

[rcgldr]

Can somebody tell me what m2 / s2 measures?? A square meter per squared second?

energy per unit mass

Which would make m^2 / s^2 an optional unit form for potential, such as gravitational potential. For example, for object close enough to Earth's surface that gravitational force can be considered constant, then gravitational potential = g h = (9.8 m / s^2) (h m) = 9.8 h m^2 / s^2.