Best answer:
In classical physics the force of gravity is W = mGM/r^2 where m is the target mass that has the force called weight, G is a tiny constant, M is the source mass of the gravity field (e.g., Earth), and r is the distance between m and M. So what you weigh, the force of gravity, is determined by your mass m, the...
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Best answer: In classical physics the force of gravity is W = mGM/r^2 where m is the target mass that has the force called weight, G is a tiny constant, M is the source mass of the gravity field (e.g., Earth), and r is the distance between m and M. So what you weigh, the force of gravity, is determined by your mass m, the Earth's mass M, and how far you are from Earth's center of mass. ANS.
But a more precise model for the force of gravity is the general theory of relativity. It specifies that gravity sources are mass, energy, and/or stress. Not just mass. And it also specifies that the characteristics we attribute to the force of gravity are due to warped space. [Check the image.]
As you can see in the image, space curves inward onto the mass of Earth. These curve lower the potential energy in closer to the planet. So potential energy wells are created. And objects falling into those wells pick up kinetic energy as their potential energy decreases. So the objects are both accelerating and falling toward the planet. Both are gravity characteristics: attraction and acceleration.
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3 days ago