In a perfectly-shaped sphere, with a smooth surface, and composed of exactly the
same substance with the same density throughout it, the force of gravity is zero at
the exact center of the sphere. That does NOT mean that 'gravity becomes zero' at
the center. It means that at the center, for every speck of mass pulling on you in
any direction with any force, there's another speck of mass pulling you in exactly
the opposite direction with exactly the same amount of force, so the whole thing
adds up to zero.
In the real Earth, we can't tell exactly where that point is, because the Earth is
not a perfect sphere shape, It doesn't have a smooth surface, and we don't know
every last little detail about the distribution of mass inside it.
No. Gravity does decrease in strength as distance from Earth decreases, but it never goes to zero. At a distance of about 1.5 million kilometers, however, Earth's gravity becomes negligible and the sun's gravity has a greater influence on the movement of objects.
No.
Yes. At least, the gravity resulting from planet Earth.
Yes; the gravity from different sides should cancel, for a net result of zero gravity.
No. At the centre of the earth the acceleration due to gravity is ZERO
Gravity doesn't become zero at equator, its value is roughly the same all over the earths surface.
Acceleration due to the earth's gravity is zero at the center of the Earth because at that point the mass of the earth is equally distributed in all directions, so pulling equally in all directions for a net zero pull. Simplistically, acceleration due to gravity decreases as distance from the center decreases. At the center the distance is zero, hence gravity is zero.
The gravity at the center of the Earth is zero because the mass around you causes gravity to be in equilibrium. It is pulling in all directions equally, resulting in a net zero gravitational force at the center.
when object fall free like at centre of earth that we call freefall with zero gravity.
There is no "zero gravity" place. Gravity permeates all the universe. Astronauts in orbit are often said to be in zero gravity but they are, in reality, on a position where their orbital velocity balances the attraction of the Earth.
No
9.8 m/s2 ---------------------- Yes this is the average value of acceleration due to gravity near by the surface of the earth. As we go higher and higher level this g value decreases and becomes almost negligible. Same way as we go deeper and deeper the g value decreases and at the centre of the earth its value becomes zero.