You can't defy gravity. Nothing defies gravity, not even "a balloon or a rocket." The reason balloons can float is because the helium within them is much lighter than air, and so the helium in the balloon pulls it upwards. The reason rockets can fly is because the amount of force they obtain taking off the ground is too strong for gravity to overcome. It's still there in both situations.
There are simulations you can go through to experience zero-gravity, though. There's a zero-gravity plane that can harbor the effects of weightlessness by going up and down and quick swoops. (:
You can DEFY gravity (as in act as if it doesn't matter), but it won't end well.
If you're laying on the ground, and gravity comes from the sides (all sides, I assume), you won't move "to the side" because it will be an equal pull in all directions "sideways." But, since gravity is no longer pulling you to the ground (downward), you may move away from the ground.
If you have enough force to propel yourself away from the object pulling you down (for example a plane, or just you jumping) then you can temporarily seem to not be interacting with gravity. But the force is always there, pulling you down, and you are merely pulling yourself away from the gravitational force, not actually defying it.
Gravity is a result of mass, the more massive an object the more gravity it creates, gravity is only a side effect it does not exist on its own. The only way to defy gravity would be to discover the opposite of mass (which does not exist as far as we know)
9 months ago
Last edited at 5:53AM on 3/20/2013
Gravity is complicated and you can defy gravity. The amount of gravitational pull on earth can be determined by using Newton's formula: Fg=Gm1*m2/r^2. All you have to do is have more force than 3.67*10^22 newtons...This may be a bit more than what you really wanted but if you are laying on the ground and gravity is pulling from the sides, if you had something mounted to the ground to hold on to, you would "defy" gravity. Defy just means to resist something. By jumping, throwing a rock, or even picking something off the ground is an act of that mass resisting gravity by another force. Another interesting point to make is that if you were to throw a baseball hard and fast enough, it could begin to orbit the earth and still be pulled to Earth by gravity but never land. That's how our satellites work. People are telling you yes and no...look up Newton's Law of Gravity and it will tell you what I just typed but a bit more complicated. Also, ALL masses create gravity. Which is why ALL masses (you, me, some guy in China, my house, etc etc) are attracted to each other.