Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Collisions in Multiple Dimensions: Introduction01:05

Collisions in Multiple Dimensions: Introduction

7.3K
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...
7.3K
Elastic Collisions: Introduction01:00

Elastic Collisions: Introduction

15.6K
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...
15.6K
Angular Momentum: Single Particle01:10

Angular Momentum: Single Particle

8.0K
Angular momentum is directed perpendicular to the plane of the rotation, and its magnitude depends on the choice of the origin. The perpendicular vector joining the linear momentum vector of an object to the origin is called the “lever arm.” If the lever arm and linear momentum are collinear, then the magnitude of the angular momentum is zero. Therefore, in this case, the object rotates about the origin such that it lies on the rim of the circumference defined by the lever arm...
8.0K
Angular Momentum and Principle Axes of Inertia01:09

Angular Momentum and Principle Axes of Inertia

632
The concept of angular momentum for a solid structure is illustrated as the cumulative result of the cross-product of the position vector of the mass element and the cross-product of the body's angular velocity with the position vector.
To put this equation into simpler terms, it can be reconfigured using rectangular coordinates. This involves choosing an alternative set of XYZ axes that are arbitrarily inclined with respect to the reference frame. The process of deriving the rectangular...
632
Rolling Without Slipping01:09

Rolling Without Slipping

5.7K
People have observed the rolling motion without slipping ever since the invention of the wheel. For example, one can look at the interaction between a car's tires and the surface of the road. If the driver presses the accelerator to the floor so that the tires spin without the car moving forward, there must be kinetic friction between the wheels and the road's surface. If the driver slowly presses the accelerator, causing the car to move forward, the tires roll without slipping. It is...
5.7K
Collisions in Multiple Dimensions: Problem Solving01:06

Collisions in Multiple Dimensions: Problem Solving

5.7K
In multiple dimensions, the conservation of momentum applies in each direction independently. Hence, to solve collisions in multiple dimensions, we should write down the momentum conservation in each direction separately. To help understand collisions in multiple dimensions, consider an example.
A small car of mass 1,200 kg traveling east at 60 km/h collides at an intersection with a truck of mass 3,000 kg traveling due north at 40 km/h. The two vehicles are locked together. What is the...
5.7K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Cysteine-S-nitrosylation inhibits ROP5-mediated immune evasion in <i>Toxoplasma gondii</i>.

mSphere·2026
Same author

Cysteine-S-nitrosylation inhibits Rop5-mediated immune evasion in <i>Toxoplasma gondii</i>.

bioRxiv : the preprint server for biology·2025
Same author

Defining Standard Data Reporting in Pelvic Exenterations for Non-Rectal Cancers: A Systematic Review of Current Data Reporting.

Cancers·2025
Same author

Rotational orientation control of a ground state ortho-H<sub>2</sub> dissociation on a metal surface.

Nature communications·2025
Same author

The F + HD (<i>v</i> = 0, 1; <i>j</i> = 1) reaction: angular momentum correlations in the low (<1 meV) collision energy regime.

Physical chemistry chemical physics : PCCP·2024
Same author

Using systems mapping to understand the constraints and enablers of solutions to plastic pollution.

Journal of environmental management·2024

Related Experiment Video

Updated: Apr 2, 2026

Methods for Measuring the Orientation and Rotation Rate of 3D-printed Particles in Turbulence
12:34

Methods for Measuring the Orientation and Rotation Rate of 3D-printed Particles in Turbulence

Published on: June 24, 2016

10.7K

Rotational Orientation Effects in NO(X) + Ar Inelastic Collisions.

M Brouard1, H Chadwick1, S D S Gordon1

  • 1The Physical and Theoretical Chemistry Laboratory, The Department of Chemistry, University of Oxford , South Parks Road, Oxford OX1 3QZ, United Kingdom.

The Journal of Physical Chemistry. A
|September 29, 2015
PubMed
Summary

Collision-induced orientation in NO(X)-Ar collisions was studied. Quantum mechanics, not classical trajectories, accurately explains the observed rotational orientation effects in these inelastic collisions.

More Related Videos

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
11:51

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

Published on: February 22, 2018

9.2K
Observation of the Ciliary Movement of Choroid Plexus Epithelial Cells Ex Vivo
08:00

Observation of the Ciliary Movement of Choroid Plexus Epithelial Cells Ex Vivo

Published on: July 13, 2015

12.8K

Related Experiment Videos

Last Updated: Apr 2, 2026

Methods for Measuring the Orientation and Rotation Rate of 3D-printed Particles in Turbulence
12:34

Methods for Measuring the Orientation and Rotation Rate of 3D-printed Particles in Turbulence

Published on: June 24, 2016

10.7K
Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
11:51

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

Published on: February 22, 2018

9.2K
Observation of the Ciliary Movement of Choroid Plexus Epithelial Cells Ex Vivo
08:00

Observation of the Ciliary Movement of Choroid Plexus Epithelial Cells Ex Vivo

Published on: July 13, 2015

12.8K

Area of Science:

  • Chemical Physics
  • Molecular Collisions
  • Quantum Mechanics

Background:

  • Investigating rotational angular momentum orientation effects in molecular collisions provides insight into collision dynamics.
  • Nitric oxide (NO) is a key molecule for studying these effects due to its electronic and rotational properties.

Purpose of the Study:

  • To experimentally and theoretically investigate rotational angular momentum orientation effects in rotationally inelastic collisions of NO(X) with Argon (Ar).
  • To compare experimental results with theoretical calculations to understand the underlying mechanisms of collision-induced orientation.

Main Methods:

  • Experimental investigation using a crossed molecular beam apparatus with hexapole electric field state selection.
  • Velocity-map imaging and circularly polarized probe radiation for state-resolved differential cross sections and determining NO rotation sense.
  • Theoretical analysis using close-coupled quantum mechanical, quantum mechanical hard shell, quasi-classical trajectory (QCT), and classical hard shell calculations.

Main Results:

  • Experimental and theoretical polarization-dependent differential cross sections show good agreement.
  • Collision-induced orientation effects were observed and quantified.
  • Quasi-classical trajectory (QCT) calculations could not fully account for the observed rotational orientation.

Conclusions:

  • Quantum mechanical effects play a crucial role in determining rotational orientation in NO-Ar collisions.
  • Classical mechanisms alone are insufficient to explain the observed orientation phenomena.
  • The study highlights the importance of quantum mechanics in understanding molecular collision dynamics.