Abstract
Ever since 1687 when Sir Issac Newton gave his famous law of gravitation scientists all over the world have used it to study the figure of the earth. The law can be written as follows,
Where F is the force of attraction between two point masses m1 and m2 and r is the distance between them, G is the universal gravitational constant. The value of G has been determined by several workers including Henry Cavendish in 1798 and its latest value adopted is (6.673 ± 0.003) X 10−8 c.g.s. units (IUGG, 1967). In Equation (1.1) if we substitute m 1 = 1 unit, m2 = M, the mass of the earth, R- the distance from the centre of gravity of the earth to its surface, we can write,
Where g is the acceleration due to gravity. It is expressed in ft sec −2 or cm sec −2. Geophysicists generally use a unit of ‘gal’ which is defined as an acceleration of 1 cm sec−2. One milligal is 1/1000 of a gal.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Author information
Authors and Affiliations
Rights and permissions
Copyright information
© 1985 D. Reidel Publishing Company, Dordrecht, Holland
About this chapter
Cite this chapter
Verma, R.K. (1985). Measurement of Gravity for Study of Figure of the Earth. In: Gravity Field, Seismicity and Tectonics of the Indian Peninsula and the Himalayas. Solid Earth Sciences Library, vol 3. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-5259-1_1
Download citation
DOI: https://doi.org/10.1007/978-94-009-5259-1_1
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-8822-0
Online ISBN: 978-94-009-5259-1
eBook Packages: Springer Book Archive