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Videos de Conceptos Relacionados

Variation in Acceleration due to Gravity near the Earth's Surface01:20

Variation in Acceleration due to Gravity near the Earth's Surface

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.
The difference between the true and apparent weights is proportional to the square of the Earth's angular speed. Since the...
Impact: Problem Solving01:26

Impact: Problem Solving

In an experiment conducted during a Mars mission, a rover propels a projectile with an initial velocity, and the projectile rebounds after colliding with the Martian surface. To ascertain the maximum height attained by the projectile after this collision, the known restitution coefficient and acceleration due to gravity are employed.
By designating the launch point as the origin and utilizing kinematic equations, the vertical component of the projectile's velocity at the point of impact is...
Free-falling Bodies: Example01:05

Free-falling Bodies: Example

An object falling without any air resistance under the influence of gravitational force is said to be in free-fall. For free-falling bodies, the acceleration due to gravity is constant, irrespective of their mass. Free-fall is experienced not only by objects falling downward, but also by all objects whose motion is influenced by gravitational force alone. The dynamics of free-fall motion can be calculated using kinematic equations of motion, since free-fall acceleration is constant.
The...
Free-falling Bodies: Introduction01:07

Free-falling Bodies: Introduction

All objects, neglecting air resistance, fall with the same acceleration towards the Earth's center due to the force exerted by the Earth's gravity. This experimentally determined fact is unexpected because we are so accustomed to the effects of air resistance and friction that we expect light objects to fall slower than heavier ones. People believed that a heavier object had a greater acceleration when falling until Galileo Galilei (1564–1642) proved otherwise. We now know this is not the case.
Acceleration due to Gravity on Earth00:55

Acceleration due to Gravity on Earth

Newton's second law is closely related to his first law of motion. It mathematically gives the cause-and-effect relationship between force and changes in motion. Newton's second law is quantitative and is used extensively to calculate what happens in situations involving a force. All external forces acting on a system add together to produce a net force Fnet. A larger net external force produces a larger acceleration. This acceleration is directly proportional to, and in the same direction as,...
Acceleration due to Gravity on Earth01:21

Acceleration due to Gravity on Earth

According to Newton's law of gravitation, the gravitational force on a body is proportional to its mass. According to Newton's second law of motion, the acceleration produced by an external force is inversely proportional to the force. Hence, the acceleration of an object under an external force of gravitation is independent of its mass.
The acceleration of an object close to the Earth, because of the Earth's gravitational pull, is called the acceleration due to gravity. It is always directed...

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Video Experimental Relacionado

Updated: Jun 28, 2026

Simulation of Human-induced Vibrations Based on the Characterized In-field Pedestrian Behavior
10:52

Simulation of Human-induced Vibrations Based on the Characterized In-field Pedestrian Behavior

Published on: April 13, 2016

Efecto trampolín en movimientos extremos del suelo.

Shin Aoi1, Takashi Kunugi, Hiroyuki Fujiwara

  • 1National Research Institute for Earth Science and Disaster Prevention, 3-1 Tennodai, Tsukuba, Ibaraki 305-0006, Japan. aoi@bosai.go.jp

Science (New York, N.Y.)
|November 1, 2008
PubMed
Resumen

El movimiento del suelo de un fuerte terremoto puede tener una aceleración vertical extrema, que excede significativamente las fuerzas horizontales. Un nuevo modelo de masa rebotante explica esta asimetría, mejorando las evaluaciones de riesgos sísmicos.

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Experimental Methods to Study Human Postural Control
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Simulation of Human-induced Vibrations Based on the Characterized In-field Pedestrian Behavior
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Área de la Ciencia:

  • La geofísica es la geofísica.
  • Ingeniería de terremotos Ingeniería de terremotos.
  • Sismología Sismología Sismología.

Sus antecedentes:

  • Las evaluaciones tradicionales de riesgos sísmicos se centran principalmente en el movimiento horizontal del suelo.
  • Eventos sísmicos recientes han puesto de relieve el impacto significativo de la aceleración vertical del suelo.

Objetivo del estudio:

  • Para investigar la aceleración de la superficie vertical sin precedentes registrada durante el terremoto de Iwate-Miyagi en 2008.
  • Desarrollar un modelo que explique la asimetría observada en el movimiento vertical del suelo.

Principales métodos:

  • Análisis de los registros de movimiento del suelo del terremoto de Iwate-Miyagi de 2008 (Mw 6.9).
  • Desarrollo de un modelo físico simplificado (masa rebotando en un trampolín) para simular el movimiento vertical del suelo.

Principales resultados:

  • La aceleración vertical registrada alcanzó casi cuatro veces la gravedad, superando la aceleración horizontal.
  • La asimetría observada en la aceleración vertical (amplitud ascendente 1,6 veces descendente) no se explicó con los modelos de respuesta del suelo existentes.
  • El modelo de masa rebotante explica con éxito la gran amplitud y la asimetría.

Conclusiones:

  • El estudio identifica un modo previamente no reconocido de fuerte movimiento del suelo caracterizado por una aceleración vertical significativa y asimétrica.
  • Este hallazgo requiere avances en las metodologías de evaluación de riesgos sísmicos cercanos a la fuente.
  • El modelo propuesto ofrece una nueva perspectiva para comprender y predecir el movimiento vertical extremo del suelo durante los terremotos.