Abrir versión para imprimir (puede necesitar FlashPlayer pero es más apta para uso en dispositivos móviles)
Abrir versión multimedia (puede necesitar FlashPlayer)
Publicado el: 2017-03-22
Tiempo de estudio aproximado: .50 - .75 h
Incluye sonido: no
Áreas temáticas
Geospatial
Descripción:
The first of a two-part series, this 40-50 minute non-narrated interactive lesson is intended to help professionals with basic science background better understand the Earth’s gravity field and what causes its variations. Of particular interest to earth/physical scientists as well as surveying engineers, this lesson covers Newton’s laws with a focus on Earth’s gravity field as it applies to geodesy. After a review of the basics of Newtonian gravitation and gravity, it explores how density, altitude, and latitude affect gravity.
Objetivos:
- Define the basic properties of gravitation.
- Explain the properties of gravitation near a large mass such as a planet.
- Explain the relationship between gravitation and gravity.
- Identify density, altitude, and latitude as the three key influencing factors on gravity.
- Explain how gravity’s magnitude varies with latitude.
- Show how gravity’s magnitude decreases with altitude.
- Give examples of high and low density features of Earth and the resulting changes in gravity.
- Describe the impact of mass movement on gravity.
- Identify the signals that gravimeters measure.
Palabras clave
national geodetic survey, geodesy, gravity, gravitation, gravity field, geoid, the geoid, ellipsoid, geopotential, geopotential datum, earth gravitational model, gravity anomalies, geodetic latitude, geocentric latitude, gravity, gravitation, ellipsoid, ellipsoidal earth, vector force, newton, newtonian physics, Newton’s Second Law of Motion, Somigliana-Pizetti equation, apparent force, centrifugal force, universal gravity constant, gravity calculation, gravity variations, earth density, gravity measurement, gravimeter, mass movement