does gravity affect the way objcets move?why?
113961
Simple explanation:\n- - - - - - - - - - - -\n\nThere are four fundamental forces that act on objects:\n\nGravity\nElectromagnetism\nWeak (responsible for radioactive decay)\nStrong (holds the nucleus together)\n\nFrom Newton's 2nd law, a force F= m a where m is the mass of the object and a is its acceleration (acceleration describes how an object changes speed, so it has to do with movement of the object). \n\nGravity is one of the 4 possible choices for F. So when the force of gravity exists, things accelerate, according to Newton's 2nd law. \n\nDeeper Exploration:\n- - - - - - - - - - - - - \n\nOne can ask the question, but WHY does gravity create a force? Einstein described it in the general theory of relativity as a bending of the space we live in (called spacetime: 3 space dimensions and one time dimension), and then specified that objects are required to take the shortest path in this curved space. \n\nHowever, that still does not describe WHY gravity does this. Current belief (but not yet proved) is that two objects with mass exchange messenger particles called gravitons (not yet observed) that communicate the force of gravity between then (electromagnetism has photons, or light as messenger particles, weak and strong forces also have messenger particles, so people think that gravity should as well). \n\nAnother interesting thread of thought in physics is that all 4 of the four fundamental forces are aspects of the same thing (just like electricity and magnetism are aspects of the same thing). So far, weak forces and electromagnetism have been shown to have the same origin when looked at in the right way, and it is possible that the strong force has the same origin as well (called a Grand Unified Theory, or GUT). Physicists are trying to find a framework whereby all 4 forces are aspects of the same universal force (called a Theory of Everything, or TOE).\n\nHowever, one can still ask, why is it this way? Well, although we have a few theories here and there, very little is proven, and the basic bottom line is, we do not know WHY gravity makes things move. \n\nBut we have a lot of clues and equations and we can make very accurate predictions for how gravity works in many cases.
596583
Mass. I think.Depending on how strong the gravity is your mass changes.
764180
Yes it will as you are taking your weight against gravity which takes more effort and uses more energy....;
834589
no...gravity always acts on one point known as your center of gravity...not on ur face\nbut since there is a pull on ur body ur joints in ur body are compressed togethere because between the joints is a lubricating fluid.....gases and fluids(to a smaller extent) can be compressed this is the cause of shortning
528357
because of the gravitational pull on the water, it comes down, not straight
868820
the answer above is wrong to a degree - in your example i would have to imagine falling through a vacuum therefore if he didn't touch the sides his momentum would carry him to the other side and then back again over and over\n\nthe answer above ( 1st ) assumes air resistance would slow him down but he would go back and forth for a long time before stopping\n\nthe gravity would decrease on the way down and increase on the way up but not in the way you think what would happen is that the gravity would be pulling from the side more and more the deeper you got ( so the effect is only virtual) you would always be in a 1g field it is just the direction(s) of the pull that would change\nthe direction of the most mass at any one time would appear to be down and at the center all pulls ( 360 degrees ) would seem to cancel one another ( but they would still be there )
195652
the earth is a oblate spheroid....we do not fall to the edges because of the gravitational pull...
710073
They had that on an episode of Mythbusters.  The ball travelled less further because of the decrease in mass and no change in volume.  It was more susceptible to air resistance.
1044543
General Theory of Relativity:\n\nA mass in space creates an indention much like a bowling ball on a trampoline.  Its this indention that is the cause of gravity.  If a marble were to roll across the trampoline into that indention, it would take a curve path and eventually fall into the bowling ball.  This is what happens when you fall to the Earth: your body is in a sense sliding on the curvature of space-time.
988087
Gravity does not travel; it is a force that varies depending mostly on the size of the bodies in question.
1131554
Yes. \n\n(All of the following bars air resistance.)\n\nA trajectory would be the path that it follows. If an object has no initial velocity, it would fall straight down.\n\nBut say it did have an initial velocity. Let's say you threw a football. Does the football ever stop in mid-flight and fall straight down? No; it has an initial velocity, a sideways trajectory. If something has an initial velocity sideways, it's trajectory will look like an upside down parabola (ie y= - x^2) once gravity is applied.\n\nHope that helps.
771396
Because gravity is the same - so it has the same effect on both objects.  The larger object will strike the ground with a greater force, but both objects will accelerate at the same rate.
970347
e, because of the Newton's 1st law: "An object at rest will remain at rest unless acted upon by an external and unbalanced force . An object in motion will remain in motion unless acted upon by an external and unbalanced force". Assuming inertial frame of reference.\nThe object can still have angular acceleration if there are two forces cancelling each other but are applied to an object at different points. \n\nIn real life there is always something that will slow down the object even in space.
255989
A stationary body submerged in a liquid is effected by two forces, gravity and buoyancy. Gravity acts at the center of mass and it is always directed straight down. On a rigid body, the center of gravity can be considered stationary in reference to the body. Buoyancy, on the other hand, acts at the center of buoyancy, and the center of buoyancy moves as the body tilts and rolls. The size of the gravity force is;\n\nFg = Mass * Gravity\nThe size of the buoyancy force is proportional to the volume of liquid that it displaces, the force of gravity and the density of the liquid.\n\nFb = (Volume * LiquidDensity) * gravity\nWhen an object is stable in the liquid, the gravity force and the buoyancy force cancel each other out. This means that the boat is displacing an amount of liquid that weight as much as the boat does itself.\n\nFg = Fb
939985
Well, yes, the gavity is pulling you down, and you are not moving. So you are subjected to an acceleration and are not moving.\nMind you, one can argue that the *resulting* force is zero, as the ground is reacting with an equal and opposite force to your weight; if you take it that way, to have an unbalanced force should result in motion.
730247
Yes, there is gravity at the center of the earth, but it would exert the same force in all directions at once, resulting in a net acceleration of zero.  Therefore, yes, you would float in the same manner as if you were in outer space.
991785
The gravity force depends on the mass of the object. For gravitational force, rotation of an object doesn't matter, it will always pull to the centre of mass.\n\nRotational momentum can cause objects to be thrown off if the momentum causes a movement which exceeds escape velocity. Escape velocity depends on the mass centre.\n\nA spinning ball simply has a very low escape velocity. If you spun a ball so it rotates once every 24 hours, things probably wouldn't be thrown off, either.