I was told the gravitational pull is found by multiplying the two masses and dividing by their distance. So why would the gravitational pull of the earth be constant on all objects? I know it is so don't flame me about being dumb, I just want to know WHY.
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The FORCE is found my multiplying the masses.
The ACCELERATION does not depend on the second body's mass at all. It is equal to g = GM/R^2 = 9.8 m/s^2.
The ACCELERATION does not depend on the second body's mass at all. It is equal to g = GM/R^2 = 9.8 m/s^2.
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The value for g is not a constant. The mass of the Earth is much greater than the mass of the object pulled towards the center of the earth. Compare the value of g at the equator to the value at the North Pole or at the top of Mount Everest, or 2 miles towards the center of the Earth in a mine shaft.
That variation could be more than a few percent.
That variation could be more than a few percent.
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F= G*((m1*m2)/r^2)
This shows that the further away from the center of the earth you are the lower the gravitational force, don't start thinking if you go on top of mount Everest that you will start floating, this is not true, the difference is not that big.
This shows that the further away from the center of the earth you are the lower the gravitational force, don't start thinking if you go on top of mount Everest that you will start floating, this is not true, the difference is not that big.
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The 9.8 number refers only to objects on or near the surface of the earth. As you move away from it, the pull diminishes. That number cannot change unless you can figure out a way to change the mass of the earth.
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You've got it exactly right- Compared to the gravity of the earth, the gravity of any object you drop towards it will be pretty much negligible.
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The moon and other planets will have a certain gravitational pull, it deepends on the mass of the planet
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It is a universal constant. Constants are, well, constant.
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Because the mass of the earth is constant.