# The Naked Scientists Forum

### Author Topic: What is a 1g constant acceleration in a vacuum?  (Read 1122 times)

#### thedoc

• Sr. Member
• Posts: 511
• Thanked: 11 times
##### What is a 1g constant acceleration in a vacuum?
« on: 17/04/2015 15:46:32 »

I would like to calculate a 1g constant acceleration in a vacuum.
What do you think?
« Last Edit: 17/04/2015 15:46:32 by _system »

#### UltimateTheory

• Sr. Member
• Posts: 107
• Thanked: 1 times
##### Re: What is a 1g constant acceleration in a vacuum?
« Reply #1 on: 17/04/2015 16:59:22 »
You will get something like this:

a=9.81 m/s^2 is only at ground level,
the higher altitude the lower will be a.

Different regions of Earth also have different distances to center, different distribution of mass inside, and slightly different accelerations at ground level:
http://en.wikipedia.org/wiki/Gravity_of_Earth
image map showing variations.
« Last Edit: 17/04/2015 17:06:11 by UltimateTheory »

#### PmbPhy

• Neilep Level Member
• Posts: 2760
• Thanked: 38 times
##### Re: What is a 1g constant acceleration in a vacuum?
« Reply #2 on: 17/04/2015 17:16:25 »
Quote from: UltimateTheory
You will get something like this:

a=9.81 m/s^2 is only at ground level,
the higher altitude the lower will be a.

Different regions of Earth also have different distances to center, different distribution of mass inside, and slightly different accelerations at ground level:
http://en.wikipedia.org/wiki/Gravity_of_Earth
image map showing variations.

Quote from: thedoc

I would like to calculate a 1g constant acceleration in a vacuum.
What do you think?
This is an incomplete question. I assume he's asking what the trajectory of an object is that is accelerating at a rate of 1g. If so then see: http://home.comcast.net/~peter.m.brown/sr/uniform_accel.htm  This is a relativistic calculation and as such as exact as can be determined.

#### The Naked Scientists Forum

##### Re: What is a 1g constant acceleration in a vacuum?
« Reply #2 on: 17/04/2015 17:16:25 »