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

Rolling Resistance01:21

Rolling Resistance

733
When a solid cylinder rolls steadily on a rigid surface, the normal force applied by the surface on the cylinder is perpendicular to the tangent at the contact point. However, since no materials are entirely rigid, the surface's reaction to the cylinder involves a range of normal pressures.
For instance, imagine a hard cylinder rolling on a comparatively soft surface. The cylinder's weight compresses the surface beneath it. As the cylinder moves, the material in front of it slows down due to...
733
Otto and Diesel Cycle01:27

Otto and Diesel Cycle

4.3K
An Otto engine is a four-stroke engine that uses a mixture of gasoline and air as the working fuel. The fuel is injected into the cylinder, and the piston is moved completely down so that the cylinder is at maximum volume. By moving the piston up, adiabatic compression takes place. The spark plug ignites the gasoline-air mixture, and the burning fuel adds heat to the system at a constant volume. The heated mixture expands adiabatically and gets further cooled by exhausting heat, and this cyclic...
4.3K
Rolling Resistance: Problem Solving01:17

Rolling Resistance: Problem Solving

904
Rolling resistance, also known as rolling friction, is the force that resists the motion of a rolling object, such as a wheel, tire, or ball, when it moves over a surface. It is caused by the deformation of the object and the surface in contact with each other, as well as other factors like internal friction, hysteresis, and energy losses within the materials. Rolling resistance opposes the object's motion, requiring additional energy to overcome it and maintain movement. In practical...
904
Rolling Without Slipping01:09

Rolling Without Slipping

5.6K
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...
5.6K
Piaget's Stage 1 of Cognitive Development01:14

Piaget's Stage 1 of Cognitive Development

2.3K
The sensorimotor stage, the initial phase of Jean Piaget's theory of cognitive development, spans the first two years of a child's life. During this period, infants actively engage with their surroundings, building cognitive awareness through direct interaction with the world. This interaction is primarily based on sensory perception and motor actions, allowing infants to gradually understand basic physical properties and predict how objects interact within their environment.
Exploration...
2.3K
Pivot Bearings01:23

Pivot Bearings

2.4K
In mechanical systems, bearings are crucial in facilitating relative motion between two components while minimizing friction and wear. They help distribute various loads (radial, axial or a combination of both loads) across machinery parts, ensuring smooth and efficient operation.
A pivot bearing is a specialized type of bearing designed to support axial loads on a rotating shaft. The bearing surface, or the pivot, is positioned at the end of a shaft to support the axial thrust. The pivot may...
2.4K

You might also read

Related Articles

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

Sort by
Same author

Wrap-up.

The Physician and sportsmedicine·2016
Same author

Jim Palmer-Fit and 'Famed' at 45.

The Physician and sportsmedicine·2016
Same author

Shoulder Instability-A New Surgical Approach.

The Physician and sportsmedicine·2016
Same author

The Winning Ways of Joe Paterno.

The Physician and sportsmedicine·2016
Same author

Wrap-up.

The Physician and sportsmedicine·2016
Same author

Parent-Infant Workouts: More Harm Than Help?

The Physician and sportsmedicine·2016
Same journal

Understanding health insurance and the delay in care for partial meniscectomies: a comparison between public and private coverage.

The Physician and sportsmedicine·2026
Same journal

Injury incidence and risk factors in youth American football versus soccer: a national emergency department analysis.

The Physician and sportsmedicine·2026
Same journal

Links between concussion history, hypertension, and hypertension contributing factors among adolescent football athletes.

The Physician and sportsmedicine·2026
Same journal

Core muscle endurance and balance as predictors of lateral ankle sprain in adolescent team-sport athletes: a prospective cohort study.

The Physician and sportsmedicine·2026
Same journal

Impact of Achilles tendon rupture on performance and career outcomes in NFL players: a matched cohort study.

The Physician and sportsmedicine·2026
Same journal

Pre-existing injuries and illnesses in trail running: sex-based epidemiological findings from a 2022 forest marathon.

The Physician and sportsmedicine·2026
See all related articles

Related Experiment Video

Updated: Mar 17, 2026

Wheel Running and Environmental Complexity as a Therapeutic Intervention in an Animal Model of FASD
06:09

Wheel Running and Environmental Complexity as a Therapeutic Intervention in an Animal Model of FASD

Published on: February 2, 2017

7.2K

Babies on Wheels: Proceed With Caution.

L C Pacelli

    The Physician and Sportsmedicine
    |July 27, 2016
    PubMed
    Summary
    This summary is machine-generated.

    Child carriers for biking and running are popular with parents. However, numerous annual injuries indicate potential safety issues with the carriers or their usage.

    More Related Videos

    A View of Their Own: Capturing the Egocentric View of Infants and Toddlers with Head-Mounted Cameras
    03:56

    A View of Their Own: Capturing the Egocentric View of Infants and Toddlers with Head-Mounted Cameras

    Published on: October 5, 2018

    8.1K
    Quantified Assessment of Infant's Gross Motor Abilities Using a Multisensor Wearable
    09:24

    Quantified Assessment of Infant's Gross Motor Abilities Using a Multisensor Wearable

    Published on: May 17, 2024

    2.3K

    Related Experiment Videos

    Last Updated: Mar 17, 2026

    Wheel Running and Environmental Complexity as a Therapeutic Intervention in an Animal Model of FASD
    06:09

    Wheel Running and Environmental Complexity as a Therapeutic Intervention in an Animal Model of FASD

    Published on: February 2, 2017

    7.2K
    A View of Their Own: Capturing the Egocentric View of Infants and Toddlers with Head-Mounted Cameras
    03:56

    A View of Their Own: Capturing the Egocentric View of Infants and Toddlers with Head-Mounted Cameras

    Published on: October 5, 2018

    8.1K
    Quantified Assessment of Infant's Gross Motor Abilities Using a Multisensor Wearable
    09:24

    Quantified Assessment of Infant's Gross Motor Abilities Using a Multisensor Wearable

    Published on: May 17, 2024

    2.3K

    Area of Science:

    • Pediatric safety
    • Recreational activities
    • Biomechanics

    Background:

    • Parents frequently engage in running or biking activities.
    • Child carriers are commonly used to include children in these activities.
    • Physician consultations regarding carrier safety are prevalent.

    Purpose of the Study:

    • To evaluate the safety of child carriers used during recreational activities.
    • To identify factors contributing to injuries associated with child carriers.

    Main Methods:

    • Review of injury data related to child carriers.
    • Analysis of carrier designs and usage patterns.
    • Assessment of safety standards and recommendations.

    Main Results:

    • A significant number of injuries are reported annually.
    • Potential risks stem from carrier design flaws or improper use.
    • Further investigation is needed to pinpoint specific causes.

    Conclusions:

    • Child carriers present a notable risk of injury.
    • Ensuring carrier safety requires addressing both equipment and user factors.
    • Recommendations for safer use and design are warranted.