A gravity meter is a tool used to study the gravitational attraction between the earth and a mass within the instrument.
A gravity meter also known as a gravimeter is a device or instrument that measures local acceleration due to the Earth's gravity and is used to determine the gravitational attraction between the Earth and a mass. A gravity meter works on the principle of measuring the constant downward acceleration of gravity.
Despite the fact that the acceleration of gravity is a vector quantity (that is, it has a magnitude and a direction), most of the gravity meters measure the scalar magnitude of the acceleration.
Gravity meters are of two categories. The first type, the relative gravity meter, measures the difference in gravity between two locations, and the second type is the absolute gravity meter which measures the magnitude of the entire gravity field.
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