You are standing on the ground. Does this mean there is no gravitational force acting on you? If there is such a force, why aren't you moving?
2006-10-05 04:31:45 · 15 answers · asked by heaven_angels 3 in Science & Mathematics ➔ Physics
When you stand on the ground, two equal but opposite forces are acting on you. They cancel out, so you aren't moving. One is gravity, the other is electromagnetic.
The origin of the last one comes from the fact that the atoms that make up your body are repulsed by the atoms that make up the ground. An equilibrium forms: you sink a little bit in the ground, far enough for the upward force to match exactly the gravity.
2006-10-05 04:42:59 · answer #1 · answered by cordefr 7 · 1⤊ 0⤋
The gravitational force on you acting downwards is balanced by the resistance force of the earth acting upwards. With no unbalanced force, no motion results.
For example, if you're carrying a tray with a heavy weight on it, you can hold the tray so that it's not moving. If someone then comes and moves the weight, the tray will go upwards, because the resistance force provided by you is now unbalanced.
2006-10-05 04:59:15 · answer #2 · answered by Morgy 4 · 0⤊ 0⤋
Let's do this first in Newtonian physics. You're standing on the ground. The gravitational pull of the earth pulls you down. The electromagnetic forces that make the earth solid are pushing you up. They are equal and opposite forces, and you don't move.
Now in Einsteinean physics. You are located near a massive object, the Earth. This means that to maintain a locally Lorentz frame of reference, you would need to accelerate downwards at a constant rate, g, toward that center of mass. However, you find it impossible to maintain that acceleration, because the solid surface of the Earth is in your way. That surface accelerates you upwards (by electromagnetic forces), and thereby prevents you from getting nearer that massive objects.
Either way, you've got gravity acting on you.
2006-10-05 04:47:35 · answer #3 · answered by cosmo 7 · 2⤊ 0⤋
a force acting on an object does not necessarily have to produce motion. for exampe when you push a wall you are exerting a force on the wall but the wall does not move. its because the wall exerts an equal and opposite force on you.
similarly gravity always acts on any body. when you are standing gravity does act on you. but the ground provides an equal and opposite force on you so you dont move. if you jump off a building, there is no ground below you to provide that equal and opposite force and so you fall down due to earth's gravity.
2006-10-05 04:58:14 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Because the ground or what ever your standing on is acting with an equal force to stop the movement.
2006-10-05 04:42:49 · answer #5 · answered by Jeffrey S 6 · 3⤊ 0⤋
When you are standing on the ground, the gravitational force is what is keeping you on the ground. Without gravity, you'd float away. Imagine the earth as a magnet, and everything else is metal. When metal gets too close to a magnet it sticks to it. Gravity is also what keeps the planets in the same place.
2006-10-05 04:35:52 · answer #6 · answered by detroitkid17 2 · 0⤊ 2⤋
The 4 standard forces of nature are: Electromagnetic rigidity, Gravitational rigidity, good nuclear rigidity and weak nuclear rigidity. All different forces derive from those 4. The maximum useful is the best nuclear rigidity, observed through the Electromagnetic rigidity, observed through the weak nuclear rigidity and extremely last yet no longer least the Gravitational rigidity.
2016-12-04 07:25:55 · answer #7 · answered by ? 4 · 0⤊ 0⤋
It is the gravitaional force that keeps you standing on the ground and not floating off. What you need to do is stay awake in science class and stop smoking so much of that stuff at night.
2006-10-05 04:38:46 · answer #8 · answered by Anonymous · 0⤊ 1⤋
gravitational force-force of attraction bw 2 bodies in universe
if we r on ground many things surrounding us have their gravitational force acting on us besides earth heavenly bodies etc.
but we r not moving as this force is directly proportional to mass of a body and inversly proportional to distance bw them.............so earth has more mass than anything else but for sun and other heavenly bodies the distance between them and us is too large compared to that with earth........so u can conclude that no force has its effect but only the force of earth.
2006-10-05 04:38:00 · answer #9 · answered by Paddy W 2 · 0⤊ 1⤋
you and the earth exert a gravitational force upon each other.
your cohesion, and the earths, disallows you suddenly sinking through solid ground.
2006-10-05 04:35:27 · answer #10 · answered by bequalming 5 · 1⤊ 1⤋