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GRACE gravity data constrain ancient ice geometries and continental dynamics over Laurentia

M E Tamisiea1, J X Mitrovica, J L Davis

  • 1Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Mail Stop 42, Cambridge, MA 02143, USA. mtamisiea@cfa.harvard.edu

Science (New York, N.Y.)
|May 15, 2007
PubMed

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Acceleration due to Gravity on Other Planets

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An object's apparent weight is its weight measured by a spring balance at its location. It is different from its true weight, the force with which the Earth pulls it, because of the Earth's rotation. Mathematically, an object's apparent weight equals its true weight minus the centripetal force that keeps it in a circular motion along with the Earth's surface every 24 hours.
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