Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Impact: Problem Solving

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...

You might also read

Related Articles

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

Sort by

Same author

Distributions of plantar loads are altered when walking in anxiety-inducing virtual settings but not under cognitive demand.

PloS one·2026

Same author

Evaluating Emergency Department Transfers for Falls in Skilled Nursing Facilities: A Single-Site Observational Study of Witnessed and Unwitnessed Falls.

Journal of the American Medical Directors Association·2026

Same author

Development of a Fall-Specific Impact Testing Method to Evaluate Safety Helmet Performance and Injury Risk.

Annals of biomedical engineering·2025

Same author

Instrumented Mouthguards in Men's Rugby League: Quantifying the Incidence and Probability of Head Acceleration Events at a Group and Individual Level.

Sports medicine (Auckland, N.Z.)·2025

Same author

Equestrian STAR: Development of an Experimental Methodology for Assessing the Biomechanical Performance of Equestrian Helmets.

Annals of biomedical engineering·2025

Same author

Quantifying Effects of Design Features on Youth Bicycle Helmet Performance During Oblique Impacts.

Annals of biomedical engineering·2025

Same journal

Pulsatile Hemodynamics of Prehypertension and Hypertension: Associations with Pressure and Sex.

Annals of biomedical engineering·2026

Same journal

A Pressure Difference-Based Strategy for Blood Oxygen Control in Membrane Oxygenators: Reduced Modeling, Computational Simulation, and Exploratory In Vivo Evaluation.

Annals of biomedical engineering·2026

Same journal

Multidirectional Optical Bone Densitometry Using a Simulation-Based Machine Learning Model: Experimental Validation with Bone Phantoms.

Annals of biomedical engineering·2026

Same journal

Numerical Study of Human Torso Mechanical Response and Injury Assessment Under Blast Loading with Bulletproof Protection.

Annals of biomedical engineering·2026

Same journal

Immediate and Mid-Long-Term Effects of Foot Orthoses on Gait Biomechanics and Clinical Characteristics in Medial Knee Osteoarthritis: A Systematic Review and Meta-analysis.

Annals of biomedical engineering·2026

Same journal

Screening and Evaluation of Post-stroke Dysphagia: Insights from Neurology, Artificial Intelligence and Data Science-A Scoping Review.

Annals of biomedical engineering·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Jun 26, 2026

Modified Drop Tower Impact Tests for American Football Helmets

Modified Drop Tower Impact Tests for American Football Helmets

Published on: February 19, 2017

Evaluating Polo Helmet Performance Across Different Impact Test Systems.

Nicole E-P Stark¹, Mark T Begonia², Steve Rowson³

¹Department of Biomedical Engineering and Mechanics, Virginia Tech, 325 Stanger St., Kelly Hall 120, Blacksburg, VA, 24061, USA. nestark@vt.edu.

Annals of Biomedical Engineering

|April 17, 2025

Summary

This summary is machine-generated.

Different helmet impact test systems show varied head impact responses, affecting concussion risk. Choosing the right system requires matching lab tests to real-world polo impacts for accurate helmet evaluation.

Keywords:

Helmet testing NOCSAE Oblique Pendulum Polo helmets Rotation

More Related Videos

A Test Bed to Examine Helmet Fit and Retention and Biomechanical Measures of Head and Neck Injury in Simulated Impact

A Test Bed to Examine Helmet Fit and Retention and Biomechanical Measures of Head and Neck Injury in Simulated Impact

Published on: September 21, 2017

In Vivo Protocol of Controlled Subconcussive Head Impacts for the Validation of Field Study Data

In Vivo Protocol of Controlled Subconcussive Head Impacts for the Validation of Field Study Data

Published on: April 18, 2019

Related Experiment Videos

Last Updated: Jun 26, 2026

Modified Drop Tower Impact Tests for American Football Helmets

Modified Drop Tower Impact Tests for American Football Helmets

Published on: February 19, 2017

A Test Bed to Examine Helmet Fit and Retention and Biomechanical Measures of Head and Neck Injury in Simulated Impact

A Test Bed to Examine Helmet Fit and Retention and Biomechanical Measures of Head and Neck Injury in Simulated Impact

Published on: September 21, 2017

In Vivo Protocol of Controlled Subconcussive Head Impacts for the Validation of Field Study Data

In Vivo Protocol of Controlled Subconcussive Head Impacts for the Validation of Field Study Data

Published on: April 18, 2019

Area of Science:

Biomechanics
Sports Engineering

Background:

Helmet testing systems are crucial for evaluating head impact protection.
Standardized testing is needed to ensure laboratory results reflect real-world scenarios.

Purpose of the Study:

To compare head impact response across different helmet testing systems.
To evaluate the performance of ten polo helmets using three distinct impact test systems.

Main Methods:

Ten polo helmets were tested using a twin-wire guided drop tower, an oblique drop tower, and an impact pendulum.
Impacts were conducted at matched locations and speeds (3.46, 5.46 m/s).
Peak linear acceleration (PLA), peak rotational acceleration (PRA), peak rotational velocity (PRV), and concussion risk were analyzed using mixed-effects models.

Main Results:

Distinct differences in PRA and concussion risk were observed between oblique and pendulum systems.
Helmet responses varied significantly across test systems under identical impact conditions.
Despite system differences, a consistent rank order of helmet performance was noted.

Conclusions:

Helmet testing systems yield different head impact responses, influencing concussion risk assessment.
Selecting an appropriate test system necessitates considering sport-specific impact conditions for accurate real-world representation.