Re: Mass/enertia in weightlessness - cars in space!

From: Dave Langers (spam.messages_at_annoy.us)
Date: 02/17/05 

Date: Thu, 17 Feb 2005 14:06:44 +0100

> Sorry if this is way too basic for this NG, please suggest where I
> should post.
> If I'm in a big room in a space station or the bay of the shuttle
> (effectively weightless) and there's a car in there (JUST SAY!!!), and
> I'm braced against one wall and I push the car over to my other
> astronaut pal on the other side... does it crush him because it still
> has the *mass* of a car and tremendous enertia coming towards him at
> speed, or can he just push it back to me like it was made of
> styrofoam?

Don't try that at home ;)

The cars inertia is still enormous, as you correctly noticed, so he may
just get crushed. (Why did you think that you need to brace yourself to
push it? That is just the same.)

BTW: You could also say that you are pushing the entire space station,
bracing against the car. A space station surely seems to be an efficient
thing to crush a person with. (Although the effect is still the same of
course.) 

-- 
   M.vr.gr.
   Dave
   ("d-dot-langers-at-wxs-dot-nl")

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