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2007-01-09 08:45:47 · 4 answers · asked by **~~;BaByBoo~~** 1 in Science & Mathematics Physics

4 answers

The DIMENSIONAL UNITS are L T^(-2), where L stands for "Length" and T stands for "Time." Thus, no matter what measurement system you employ, acceleration is always expressed as "So much length (or distance) per (time unit squared)," or "length per (unit time) per (unit time). "

In the SI system, g is ~ 9.80 m s^(-2).

["~" means "approximately equals," m is the metre, and s stands for a second.]

In SI's c.g.s. predecessor, it's ~ 980 cm s^(-2).

In Imperial units it's ~ 32.2 ft s^(-2).

[cm means centimetre, ft stands for feet]

Because the time unit is the same, the transformation from one to the other for those examples given above simply involves the different lengths employed. For example, since, approximately:

g = 980 cm s^(-2) = 32.2 ft s^(-2), we should be able to confirm (again, approximately) that

980 cm = 32.2 ft = 12 x 32.2 inches = 386.4 inches; that is, that:

1 inch = 980/386.4 cm = 2.5362... cm

Well, that's pretty consistent, particularly since we only started with 3 sig. fig. accuracy, if that. This result is fairly good for an approximate calculation. (Since 1959 the International Inch has been DEFINED as 2.54 cm, EXACTLY.)

Live long and prosper.

2007-01-09 08:49:21 · answer #1 · answered by Dr Spock 6 · 0 0

Free fall acceleration and gravity are measured differently.

Free fall acceleration is the same as any other acceleration and is measured by meter per second squared (m/(s^2)).

Gravity is a force and is therefore measured by Newton (N).

2007-01-09 08:54:47 · answer #2 · answered by Rullie 1 · 0 0

Acceleration is distance/time/time. In SI units this is:

metres per second per second.

or

ms^-2

2007-01-09 08:50:44 · answer #3 · answered by Anonymous · 0 0

acceleration is distance per time per time, in metric G=9.8 meters per second squared (m/s^2), in english G=32 feet per second squared (ft/s^2) or 386 in/s^2.

acceleration is the increase in velocity per unit time, velocity is distance / time, acceleration might be easier to understand if we wrote it (distance/time) / time

2007-01-09 08:53:26 · answer #4 · answered by Leonardo D 3 · 0 0

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