Brian Cox visits the world's biggest vacuum chamber - Human Universe:BBC Two

you tube ^ | 10-24-14 | bbc

[TurboZamboni]

Your physics teacher always told you this was true. You've never seen it until now.

A lot of Newtonian physics happens in this hypothetical world where no outside forces act upon an object. But Earth isn't a vacuum, and outside forces are acting on objects all the time! Now, for the first time, you can see proof of what your physics teacher was telling you right in front of your eyes.

Brian Cox visits NASA’s Space Power Facility in Ohio to see what happens when a bowling ball and a feather are dropped together under the conditions of outer space.

[cripplecreek]

That place sucks.

[rarestia]

VERY cool. Thank you for sharing this, Zam.

[Kirkwood]

They forgot this?

https://www.youtube.com/watch?v=5C5_dOEyAfk

[43north]

How did he get inside nanzi pelousi’s head?

[OldNavyVet]

Physics ... I’ll never forget my first Physics class day in college where the professor walked over to a wall and pressed on it with most everything he had. While so doing he asked. “How much force am I applying here?”

Anyone care to answer?

[blackdog]

The things I wish we could watch instead of the garbage streamed to us 24/7.

[rightwingcrazy]

Did the wall move?

[Rebel_Ace]

“How much force am I applying here?”

Force = Mass x Acceleration

If he did not move the wall, from a Physics standpoint, no work was done, hence no "force".

At least, that is the answer he was looking for.

[dfwgator]

Or Bill Clinton’s nose.

[Celtic Conservative]

None.

CC

[Celtic Conservative]

I’m currently somewhere I can’t access youtube. Is this lab part of Wright/Pat’s compound.

CC

[left that other site]

Grrr...you beat me to it! ;-)

[OldNavyVet]

You got it ... Zero is the answer he was looking for. The equation he wanted to hear is F = MA.

[ClearCase_guy]

Nature abhors NASA’s Space Power Facility in Ohio.

[Rodamala]

Anyone care to answer?

ΣF_x=0
ΣF_y=0
ΣF_z=0
ΣM=0

...assuming static equilibrium.

[loungitude]

In about my third Physics class, the professor was a small nerdy guy. He was a fine instructor. But the first thing he did, and I will always remember this, was to take the chalk and make a dot on the blackboard. As he did this, he said “Let’s take an electron, and place it here, shall we?”

[loungitude]

Force is not work. One can apply whatever force and do no work. Work is force times distance.

[Weirdad]

Thanks!

[Rebel_Ace]

"Force is not work. One can apply whatever force and do no work. Work is force times distance."

In my reply I said the answer the instructor was "looking for" was the F=MA, where A was zero because the wall did not move. Obviously, if you were to put a force transducer on the wall and let the teacher push on it, you would find that he is indeed exerting some pressure on the wall, but that was not what he was really after.

Work is indeed force times distance. No movement means a distance of zero. No movement means no acceleration, which means from a TEXTBOOK definition, no Force.

Like I mentioned above, an instrument would show he was exerting some pressure, he was just looking for the "pristine" application of the definitions.