what are theeffects of gravity on the human body?
442627
On the liquid parts of the body, gravity has the normal effect to "attract the liquids towards the Earth", meaning to bring the blood down to the feet (the heart recirculates the blood through the whole body); that is why when your boold pressure is low, doctors recommend you to lie down so the blood gets to your brain easily.\nOn the solid parts of the body, little or no effect of gravity should be noticed.\n\nNow, the psychological effects of gravity (or lack of it) are still unknown, and experiments are being done all the time to get an answer to this.
28057
Weight is the force on an object caused by gravity. It is usually measured in pounds in the English system and newtons in the metric system. To find the weight (in newtons), multiply the mass in kilograms (44) by the acceleration of gravity (9.81).\n\nP.S. Newtons do measure weight since weight is a force.\n\nP.P.S. Don't listen to the guy below me. The acceleration of gravity is not 10. It is 9.81 (assuming you are on the Earth). The weight would be 44*9.81.\n\nhttp://en.wikipedia.org/wiki/Gravity#The_Earth.27s_gravity
842967
Gravity is a condition of the space-time continuum which is associated with mass.  Every object which has a mass will have a gravitational attraction to any other close object with a mass.\n\nThe planet Earth has a mass, and therefore has a "gravity."
112179
Gravity is a force of attraction that acts between bodies that have mass. It is a physical phenomenon of fundamental importance, profoundly affecting the workings of the world around us and the universe beyond. Most familiarly, it is the gravitational attraction of the earth that endows objects with weight and causes them to fall to the ground when dropped. In fact, gravity is also the reason for the very existence of the earth, the sun and other celestial bodies; without it matter would not have coalesced into these bodies and life as we know it would not exist. Gravity is also responsible for keeping the earth and the other planets in their orbits around the sun, the moon in its orbit around the earth, for the tides, and for various other natural phenomena that we observe.\n\nIn common usage "gravity" and "gravitation" are either used interchangeably, or the distinction is sometimes made that "gravity" is specifically the attractive force of the earth, while "gravitation" is the general property of mutual attraction between bodies of matter. In technical usage, "gravitation" is the tendency of bodies to accelerate towards one another, and "gravity" is the force that some theories use to explain this acceleration.\n\nGravity was rather poorly understood until Isaac Newton formulated his law of gravitation in the 17th century. Newton's theory is still widely used for many practical purposes, though for more advanced work it has been supplanted by Einstein's general relativity. While a great deal is now known about the properties of gravity, the ultimate cause of the gravitational force remains an open question and gravity remains an important topic of scientific research.\n\nContents [hide]\n1 Overview of the history of gravitational theory \n2 The Earth's gravity \n2.1 Comparative gravities of the Earth, Sun, Moon and planets \n3 Mathematical equations for a falling body \n3.1 Gravitational potential \n3.2 Acceleration relative to the rotating Earth \n4 Gravity and astronomy \n4.1 Self-gravitating system \n5 Practical uses of gravity \n6 Newton's law of universal gravitation \n6.1 Acceleration due to gravity \n6.2 Bodies with spatial extent \n6.3 Vector form \n6.4 Gravitational field \n7 Problems with Newton's theory \n7.1 Theoretical concerns \n7.2 Disagreement with observation \n7.3 Newton's reservations \n8 Einstein's theory of gravitation \n8.1 Experimental tests \n9 Comparison with electromagnetic force \n10 Gravity and quantum mechanics \n11 Alternative theories \n11.1 Recent alternative theories \n11.2 Historical alternative theories \n12 Notes \n13 See also \n14 References \n15 External links \n \n\n\n[edit]\nOverview of the history of gravitational theory\nThe first mathematical formulation of gravity was Isaac Newton's law of universal gravitation, published in his 1687 work Principia Mathematica. Professor William Whewell of Cambridge University, author of History of the Inductive Sciences (1837) stated:\n\n"The law of gravitation is indisputably and incomparably the greatest scientific discovery ever made, whether we look at the advance which it involved, the extent of the truth disclosed, or the fundamental and satisfactory nature of this truth." [In A Treasury of Science ed. Harlow Shapley et al, Harper & Bros. NY: 1946] \nAlthough the law of universal gravitation was first clearly and rigorously formulated by Isaac Newton, the phenomenon was observed and recorded by others. Even Ptolemy (c. 100-178) had a vague conception of a force tending toward the center of the Earth which not only kept bodies upon its surface, but in some way upheld the order of the universe. Indian astronomer Brahmagupta (598-668), who followed a heliocentric solar system, was the first to recognize gravity as a force of attraction. He explained that "bodies fall towards the Earth as it is in the nature of the Earth to attract bodies
94009
Weight can be determined by mass and the pull of gravity exerted on an object. But mass is not an indication of weight. Mass is presumed to be constant through varying gravities while weight fluctuates because it is proportional to both of these variables.
754266
yes \n\nbasic fdormula = mgh\n\nhere mg= weight of body[mass * acc. due to gravity}\nso it can be\nweight* height\n\nalso weight is a kind of force\nso weight = Force represented by F\nand 'd' = distance\nso it can be F*D where f= force[weight] and d=[distance]
439003
you and a friend go outside and do an experiment. stand on each others heads and you will get your answer. That pressure you feel on your head is the mass of your friend PUSHING down on the earth.That my dear lad is gravity.
525267
Universal Law of Gravity.\nALL objects attract each other with a force of gravitational attraction. This force of gravitational attraction is directly dependent upon the masses of both objects and inversely proportional to the square of the distance which separates their centers.\n\nWhere ever you are gravity has got you some way, however weak, something somewhere will be pulling you towards it.
47297
The 50 kg woman exerts less force: acceleration due to gravity is the same in both cases (9.8 m/sec^2), and since F = MA, the 50 kg woman will exert less force (490 N) than the 70 kg man (686 N)
526135
It's about 1/6 earth gravity. (But don't forget to add in 1/6 of the spacesuit you have to wear, too.)
565295
Gravity is created by objects. "Down" is towards the center of the earth, where gravity is strongest. All planets, stars, asteroids, etc. have gravity.
246088
ja :)..all objects with mass experience gravitational forces; about it's effects I don't know many, but the varicous veins for example are due to gravity in a way:blood doesn't flow up easily and gets stuck in his way and those are formed; also astronautes experience space motion sickness, when they are out the earth ( headache , nausea and even vomiting..yucky)...that's because our vestibular system is govern by the motion of liquid ,and when there is no gravity it originates changes.\nif you mean: humans ¨excert¨ gravitational forces by your question..I would say due to our little mass compared to the earth it means nothing (..unless you are really really fat! :P)
988819
Extremely little. The Gravity in Newtonian Physics is determined by the mass of the body which is not effected by the state of the matter only its net mass.\n\nHowever in General Relativity not only the mass but the pressure is involved. So in General Relativity increased positive pressure does very slightly increase the gravity. But this added amount is usually very insignificant for most bodies due to the fact that these pressures are extremely small relative to the speed of light.
257523
Lift, thrust, gravity, drag.
770211
each and every material is pulled towards the centre of the earth due to gravitational force.  since the object itself is placed at a depth equal to the radius of the earth, which means it is placed at the centre of the earth, it would not be pulled towards any point and hence the gravity at that point is zero.  when gravity is zero, naturally the weight is also zero.  but remember, there won't be any change in the mass of the body.
635298
Well, that depends upon how one looks at MOVEMENT.  This is to say that though we tend to understand movement in relation to distance, to other objects, to speed, and so forth, when comparing movement in relation to the universe, the one all unifying factor of that which exists in a defined reality, actual movement becomes sort of relative, taking direction with it.\n\nBefore I pick out inherent directions of movement, let me explain a little of this subjective relativity.  What if I were to instead ask, "How much does the planet Earth weigh?"  This question similarly depends upon how one looks at the variable of weight.  See, if I ask how much a frying pan weighs or how much a barbell weighs, we can automatically presume that I am talking about its weight on Earth, how it is affected by the pull of the Earth's gravity.  So, how do we judge the pull of the Earth's gravity against the Earth itself?  Some would say you can't.  Others would maintain that the Earth itself weighs nothing, just floating in space.  Still others would determine the mass of the Earth against the pull of the sun's gravity.  Still others could match the whole solar system's weight against the pull of other systems or the pull or push from the center of the galaxy, thereafter attributing the very tiny percentage of mass for which the Earth is responsible in the equation.  Other folks would simply conceptually add up the mass of the planet and imagine what that mass would weigh if it were a great big ball sitting on our planet.  A few creative folks might pit our planet's mass against a gas giant like Jupiter, determining it's weight against that pull of gravity instead of the sun's, as if we were a theoretical super-satellite (moon) of another planet.  \n\nAll these subjective, objective, and conceptual differences come into play when we are talking about things greater than the finite.  Similar questions plague your query about movement.  So, there are not so many answers as there are different things to consider and different ways to look at it.  Here are a few options...\n\n1)  Relative to the sun, the Earth revolves.\n\n2)  Relative to its axis, the Earth rotates.\n\n3)  Relative to the plane of the solar system, the Earth wobbles on its axis.\n\n4)  Relative to a line between it’s own equator and a fixed point on the sun nearest us, the Earth tilts.\n\n5)  Relative in comparison to a planet that always has the same side facing the sun, like Mercury, or in other words, relative points on the surface of the Earth and the surface of the sun, the Earth is in an exaggerated or accelerated spin or spiral away from this presumed connector.\n\n6)  Relative to the galaxy, our solar system moves out from center in the Milky Way, the Earth moving with it.\n\n7)  Relative to other galaxies, our galaxy's mass gets caught in the collective gravitational pull of the mass of others, adjusting the direction and speed in which we travel as a galaxy and thereby affecting our solar system with Earth in it.\n\n8)  Relative to other stars in our galaxy, the Earth's proximity to the sun and small size seems more like a shake or a flicker than a revolution.\n\n9)  Relative to a center of the universe in a single big bang theory, everything, including us, moves on a vector out from center.\n\n10)  Relative to Einstein's use of LAMDA in an equation meant to unify his two theories of relativity; everything also collapses in toward center slightly in a very precise balance against the movement outward.\n\n11)  Relative to a multiple big bang theory, everything moves out from the last center of the last big bang, which in turn was already in a generalized outbound pattern from a previous big bang.\n\n12)  Relative to our branch in the implied spiral of the Milky Way Galaxy, a number of systems are moving in a sort of half-parabola ever slowing.\n\n13)  Relative to the idea of a unified greatness, like a universe, a single,
57362
Weight is a unit measure of gravitational force.