GRAVITY DOES NOT PULL YOU FORWARD!!!!!!!!!!

you are all retards.

gravity is only a state of mind.

if you truly belive that there is no such thing as gravity, you can fly.

You are all so stupid..

of course Gravity pulls you forward!

If it dont pull you forward then you go flying backwards like weeeeeeeeeeeeeeeeee!!!!

Oh, and quantum physics states that anything that hasnt been observed doesnt exist.. once the object has been observed it exists...

even a baby feotus can understand high level quantum physics...

since forward motion isn't derived from gravity how about you try running without a forward lean of any sort because without truely leaning, staying exactly 90 degrees the math says forward motion is basically impossible

I'm not a poser, but gravity can aid in moving you forward. If you doubt this, test it. Stand about 3 feet from a wall, lean forward at your ankles (not your waist)until your hands brace the wall. If the wall were removed, would you fall forward? Yup. ;)

Einstein's illegitimate son wrote:

I'm not a poser, but gravity can aid in moving you forward. If you doubt this, test it. Stand about 3 feet from a wall, lean forward at your ankles (not your waist)until your hands brace the wall. If the wall were removed, would you fall forward? Yup. ;)

Note that you said gravity "can aid", not that gravity actually pulls you forward (as some have tried to claim).

In your wall example, gravity still pulls you straight down, but you are applying a force parallel to the force parallel to the angle of your body.

If you lean at any angle not perpindicular to the ground, the net addition of the force vectors (gravity down and the immovable earth back along the length of your body), you will get a net forward force.

The result is basically your body rotating around the fulcrum of your feet (until the ground applies a force to your face, causing your motion to suddenly cease).

Gravity still isn't pulling you forward though.

The high school physics applied to this thread is appalling...

I recall someone on the first page tried to apply newton's 2nd law in some attempt to explain that leaning propels you forward. One thing he forgot to include in his analysis??? FRICTION between the runner's feet and the ground.

Problem is, everyone is trying to apply rigid body dynamics to a problem that is far too complex. Hence why we have no running robots.

In its simplest sense, if you were to take a reference frame positioned at one's foot, the lean forward creates a moment about this point (from the vector product of gravitational force and the moment arm). To counter the sensation that you're 'falling', your brain tells your feet to move forward. Try it- stand with your feet together and start leaning forward at your ankles...if you don't want to fall on your face, one of your feet will move forward and prevent the fall. In effect, the lean forward induces autonomous leg movement so that you don't fall.

We don't have running robots??? Au Contraire:

http://world.honda.com/HDTV/ASIMO/200412-run/

Ok, so it's jogging but it's stil pretty cool!

yep wrote: In effect, the lean forward induces autonomous leg movement so that you don't fall.

Sure, the same way that if you're pushed from behind you'll put your hands up in front to avoid smacking your face on the back of the persons head in front of you.. whats your point?

Hilarious video. It looks like he's running to the toilet...

pumpkin wrote:

We don't have running robots??? Au Contraire:

http://world.honda.com/HDTV/ASIMO/200412-run/

Ok, so it's jogging but it's stil pretty cool!

A)running on the moon was slow for astronauts because the vertical component of the force is much greater when your getting 1/6th the downward pull you get on earth

B)your muscles are absolutely nothing like a rubber band, and certainly do not store energy from falling. You have to create new energy, which is the whole reason you have a heart that pumps blood and whatnot through your legs.

Im not sure which is more flawed, your physics theories or your basic lack of human biomechanics.

How do you lean forward? Oh that's right. Your muscles provide that force. :) Gravity by itself can not pull you forward. In order to go forward there has to be some other force or object involved. A nice kick in the arse will do the job!Alan

IB wrote:

since forward motion isn't derived from gravity how about you try running without a forward lean of any sort because without truely leaning, staying exactly 90 degrees the math says forward motion is basically impossible

Ahem. gravity does pull you forward, with the applied mechanics to do so.

Look at those gravity powered cars like the one Honda built.

*shakes his head*

So let me see, the plane can or cannot fly?

thechamelion wrote:

A)running on the moon was slow for astronauts because the vertical component of the force is much greater when your getting 1/6th the downward pull you get on earth

wrong in 3 ways. 1) the vertical component of force is much LESS when your getting 1/6th the downward pull you get on earth. 2) the astronauts didn't run on the moon, more like skipped. and 3) they moved FASTER on the moon than they would have in those bulky suits on earth.

what amuses me is how those who are arguing gravity pulls you forward are citing the slowness of astronauts on the moon when in reality the low gravity of the moon allowed them to move faster. they only appear slow because people notice their vertical velocity a lot more than their horizontal movement.

I'm just an Elementary Education major...I simply put one foot in front of the other, then repeat as quickly as possible. Who really cares about gravity--I only care about who breaks the tape.