What will be the value of g at the centre of earth? Why?
Answers
Explanation:
The value of “g” at the centre of the Earth is 0. All the mass of the Earth surrounds you equally (in all directions) and the net gravitational force is zero.
Okay!!!!!
The value of “g” at the centre of the Earth is 0. All the mass of the Earth surrounds you equally (in all directions) and the net gravitational force is zero.
G is a gravitational constant. It has the same value every where. Its value at the surface of the Earth and at the center of the Earth is the same. You can use the longer formula given by the Great Genius Isaac Newton to calculate the force of gravity at the center of the Earth. It is not zero. The force of gravity at its center is at its extreme. The force of gravity is a vector force. It has direction and amplitude. It acts radially outwards from the center. You can not use the shorter formula to calculate the force of gravity at its center. The acceleration ‘g’ has no meaning at its center as no object can penetrate the layers of Earth and can reach its center by moving. On the surface of the Earth, ‘g’ has value as the object can penetrate the layer of gas and can reach its surface. In reality, we are within the Earth on its surface under the first layer of gas. The force of gravity acting on our body and on mass of gas in the atmosphere is always pressing towards its center radially. If you calculate the force of gravity acting on your body using shorter and longer formulas of Newton, you will get same answer. Gravity demands that the whole mass of the body be concentrated at its center. You can assign your mass as m1 and the Earth’s mass as m2 (at its center) and then calculate the forces of gravity using both formulas using the value of Earth’s diameter, ‘g’ and G. Use the longer formula and keep on going down towards its center and see what happens to the value of force of gravity. When the distance becomes almost zero, it leads to ‘singularity’-means gravity at its extreme.