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Related Concept Videos

Types of Collisions - II01:19

Types of Collisions - II

10.4K
When two or more objects collide with each other, they can stick together to form one single composite object (after collision). The total mass of the object after the collision is the sum of the masses of the original objects, and it moves with a velocity dictated by the conservation of momentum. Although the system's total momentum remains constant, the kinetic energy decreases, and thus such a collision is an inelastic collision. Most of the collisions between objects in daily life are...
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Elastic Collisions: Introduction01:00

Elastic Collisions: Introduction

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An elastic collision is one that conserves both internal kinetic energy and momentum. Internal kinetic energy is the sum of the kinetic energies of the objects in a system. Truly elastic collisions can only be achieved with subatomic particles, such as electrons striking nuclei. Macroscopic collisions can be very nearly, but not quite, elastic, as some kinetic energy is always converted into other forms of energy such as heat transfer due to friction and sound. An example of a nearly...
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Impact01:30

Impact

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Impact occurs when two bodies collide, leading to the application of impulsive forces between them. Analyzing impact mechanics involves considering two colliding particles moving along a line known as the line of impact, which passes through their centers and is perpendicular to the contact plane.
When particles with different initial velocities collide, they induce deformation by applying equal and opposite impulses. At the point of maximum deformation, the particles move together with...
634
Types Of Collisions - I01:04

Types Of Collisions - I

9.7K
When two objects come in direct contact with each other, it is called a collision. During a collision, two or more objects exert forces on each other in a relatively short amount of time. A collision can be categorized as either an elastic or inelastic collision. If two or more objects approach each other, collide and then bounce off, moving away from each other with the same relative speed at which they approached each other, the total kinetic energy of the system is said to be conserved. This...
9.7K
Elastic Collisions: Case Study01:15

Elastic Collisions: Case Study

21.0K
Elastic collision of a system demands conservation of both momentum and kinetic energy. To solve problems involving one-dimensional elastic collisions between two objects, the equations for conservation of momentum and conservation of internal kinetic energy can be used. For the two objects, the sum of momentum before the collision equals the total momentum after the collision. An elastic collision conserves internal kinetic energy, and so the sum of kinetic energies before the collision equals...
21.0K
Collisions in Multiple Dimensions: Introduction01:05

Collisions in Multiple Dimensions: Introduction

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It is far more common for collisions to occur in two dimensions; that is, the initial velocity vectors are neither parallel nor antiparallel to each other. Let's see what complications arise from this. The first idea is that momentum is a vector. Like all vectors, it can be expressed as a sum of perpendicular components (usually, though not always, an x-component and a y-component, and a z-component if necessary). Thus, when the statement of conservation of momentum is written for a...
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Updated: Mar 28, 2026

Kinematic History of a Salient-recess Junction Explored through a Combined Approach of Field Data and Analog Sandbox Modeling
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Anatomy of a post-subduction collision.

Ebru Şengül Uluocak1,2, Russell N Pysklywec3, Claudio Faccenna4,5

  • 1Department of Geophysical Engineering, Çanakkale Onsekiz Mart University, Çanakkale, Türkiye. ebrusengul@gmail.com.

Nature Communications
|March 27, 2026
PubMed
Summary

Continental collision zones are complex. Mantle dynamics, driven by plumelet-plate interactions, shape tectonic deformation and plate boundaries in systems like the Arabian-Eurasian collision.

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Area of Science:

  • Geodynamics
  • Plate Tectonics
  • Continental Collision

Background:

  • Continental collision zones exhibit complex, long-lasting post-orogenic deformations.
  • Understanding mantle dynamics is crucial for deciphering tectonic evolution in these regions.

Purpose of the Study:

  • To decode the mantle dynamics governing the Arabian-Eurasian continental collision using 3D thermomechanical modeling.
  • To investigate the role of plumelet-plate interactions in shaping surface tectonics and plate boundary configurations.

Main Methods:

  • Three-dimensional thermomechanical modeling was employed.
  • Analysis focused on mantle dynamics and plumelet-plate interactions.

Main Results:

  • Plumelet-plate interactions drive deformation within and at the margins of convergent plates.
  • Unrecognized segmentation of subducted Neotethyan slabs (Bitlis and Zagros) and upper-plate tearing were identified.
  • Convective support from a plumelet caused lithospheric removal, transforming arc-to-intraplate deformation.

Conclusions:

  • A unified framework is provided for understanding upper mantle processes controlling surface deformation in post-subduction systems.
  • Plumelet dynamics are key to explaining tectonic evolution in continental collision zones.