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Related Concept Videos

Collisions in Multiple Dimensions: Introduction01:05

Collisions in Multiple Dimensions: Introduction

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 problem,...
Elastic Collisions: Case Study01:15

Elastic Collisions: Case Study

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...
Elastic Collisions: Introduction01:00

Elastic Collisions: Introduction

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...
Types Of Collisions - I01:04

Types Of Collisions - I

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...
Impact01:30

Impact

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...
Types of Collisions - II01:19

Types of Collisions - II

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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Related Experiment Video

Updated: Jul 11, 2026

Laboratory Drop Towers for the Experimental Simulation of Dust-aggregate Collisions in the Early Solar System
09:44

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Published on: June 5, 2014

Dynamics of cluster-surface collisions.

C L Cleveland, U Landman

    Science (New York, N.Y.)
    |July 17, 1992
    PubMed
    Summary
    This summary is machine-generated.

    Molecular dynamics simulations reveal that nano-cluster impacts generate extreme conditions, creating a transient, high-density, high-pressure medium. This novel environment may enable new studies in cluster impact-catalyzed chemical dynamics.

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    Visualization of High Speed Liquid Jet Impaction on a Moving Surface
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    Last Updated: Jul 11, 2026

    Laboratory Drop Towers for the Experimental Simulation of Dust-aggregate Collisions in the Early Solar System
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    Published on: June 5, 2014

    Analysis of Complex Molecules and Their Reactions on Surfaces by Means of Cluster-Induced Desorption/Ionization Mass Spectrometry
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    Visualization of High Speed Liquid Jet Impaction on a Moving Surface
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    Area of Science:

    • Materials Science
    • Physical Chemistry
    • Computational Physics

    Background:

    • Understanding shock phenomena is crucial for materials science.
    • Nano-cluster impacts present unique physical conditions.

    Purpose of the Study:

    • Investigate shock conditions generated by nano-cluster impact.
    • Explore energy and momentum transfer dynamics.
    • Assess potential for studying catalysis in extreme environments.

    Main Methods:

    • Molecular-dynamics simulations were employed.
    • A 561-atom argon cluster was simulated.
    • Impact velocity was 3 km/s onto a sodium chloride surface.

    Main Results:

    • A 'piling-up' shock phenomenon was observed.
    • Extreme local density, pressure, and kinetic temperature were generated.
    • A transient, non-equilibrium medium formed for approximately one picosecond.

    Conclusions:

    • Nano-cluster impacts create unique, transient conditions.
    • These conditions offer new possibilities for studying impact-catalyzed chemical reactivity.
    • The study highlights potential for novel catalytic processes.