Naked Science Forum

Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: Dharmansh on 11/11/2011 15:00:23

Title: Our mass in space?
Post by: Dharmansh on 11/11/2011 15:00:23

What is our mass when we are in space?

Title: Our mass in space?
Post by: Bored chemist on 11/11/2011 18:19:13

The same as it is anywhere else.

Title: Our mass in space?
Post by: CliffordK on 11/11/2011 18:34:43

Keep in mind that what we consider weightlessness in space is not true weightlessness, but rather the effect of orbiting the Earth which essentially gives perpetual freefall.  The mass of your body is still interacting with the mass of the earth.

If you had a platform without orbital motion, then you would experience your weight/mass.

Probes to other planets also experience the gravity of the sun and planets.  Inside the probe, it would seem to be zero-g due to unpowered "coasting" with the person and spaceship experiencing the same gravity.

Title: Our mass in space?
Post by: JP on 11/11/2011 19:08:00

Quote from: CliffordK on 11/11/2011 18:34:43

Keep in mind that what we consider weightlessness in space is not true weightlessness, but rather the effect of orbiting the Earth which essentially gives perpetual freefall. 

Depends on what you mean by "space."  Weightlessness in deep space is, in fact, due to no gravity.

Title: Our mass in space?
Post by: Dharmansh on 12/11/2011 05:05:35

It means that our mass is zero in space not on any planet

Title: Our mass in space?
Post by: Bored chemist on 12/11/2011 16:07:37

No it isn't.
Your mass is the same wherever you are.
My mass is about 70Kg.
On earth my weight is about 700N
On the moon my mass would be 70Kg but my weight would be about 115N.
In orbit my mass would be 70Kg and my weight would be zero.

Title: Our mass in space?
Post by: JP on 12/11/2011 16:18:02

Mass is the amount of stuff in your body.  This doesn't change if you go into space.

Weight is the force of gravity on your body.  This does change if you go into space.

Title: Our mass in space?
Post by: Dharmansh on 13/11/2011 08:32:09

ok our weight in Space is zero so can we move at the speed of light because Photon has no weight.By making advance Machines?and we can try to make energy by machines.
http://en.wikipedia.org/wiki/Photon   

Title: Our mass in space?
Post by: Bored chemist on 13/11/2011 09:36:23

No, we can't move at the speed of light because we have mass.

Mass is not the same thing as weight.

Title: Our mass in space?
Post by: Dharmansh on 13/11/2011 09:38:52

that means we can't move or we cant make any thing that can beat light...