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

Hydraulic Jump: Problem Solving

Hydraulic Jump: Problem Solving

To analyze a hydraulic jump in a rectangular channel with a flow speed of 6 meters per second, follow these steps:Calculate Effective Upstream Velocity:When the downstream gate closes, a hydraulic jump forms, traveling upstream at 2 meters per second. This wave speed combines with the initial channel flow velocity, creating an effective upstream velocity.Identify Flow Velocities Before and After the Hydraulic Jump:Upstream of the hydraulic jump, the effective flow velocity includes both the...

Hydraulic Jump

Hydraulic Jump

A hydraulic jump is a sudden rise in fluid depth in open channels, occurring when high-velocity (supercritical) flow transitions to low-velocity (subcritical) flow. This phenomenon requires an upstream Froude number greater than 1, as flows with Fr1<1 remain subcritical, making a hydraulic jump impossible due to the need for negative head loss, which violates thermodynamic principles.The characteristics of a hydraulic jump depend on the upstream Froude number and are classified as...

Upward Impending Motion

Upward Impending Motion

A square-threaded screw jack is a mechanical device widely used for lifting heavy loads or applying considerable force. Its operation is based on converting the force applied at its handle into a torsional moment, causing the upward impending motion of the screw. This movement is accomplished by overcoming the static friction between the threads of the screw and the jack.
To better comprehend how a screw jack functions, consider the completely unraveled thread as a block in contact with the...

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...

Projectile Motion

Projectile Motion

An object thrown in the air follows a parabolic path under the influence of Earth's gravitational force. The motion of such an object is called projectile motion, and the object itself a projectile. The parabolic path followed by the projectile is called the trajectory. Some common examples of projectile motion are the launching of fireworks, a golf ball in the air, meteors entering the Earth's atmosphere, and the firing of bullets.
When an object falls under gravity and has no horizontal...

Projectile Motion: Example

Projectile Motion: Example

The theory of projectile motion is very useful for players of several sports to improve their performance. For example, a javelin thrower needs to throw their javelin in such a way that it travels as far as possible. The javelin thrower takes a short run-up to increase the initial speed of the javelin. The range of a projectile is at its maximum at a 45° angle so javelin throwers try to angle their throw as close to 45° as possible.
When we speak of the range (R) of a projectile on level...

You might also read

Related Articles

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

Sort by

Same author

Dynamics and control of separable coupled rigid body systems.

Robotics and biomimetics·2017

Same author

A model of the basal ganglia in voluntary movement and postural reactions.

Computer methods in biomechanics and biomedical engineering·2013

Same author

Central mechanisms for force and motion--towards computational synthesis of human movement.

Neural networks : the official journal of the International Neural Network Society·2012

Same author

The effect of resistance level and stability demands on recruitment patterns and internal loading of spine in dynamic flexion and extension using a simple trunk model.

Computer methods in biomechanics and biomedical engineering·2011

Same author

Control of constraint forces and trajectories in a rich sensory and actuation environment.

Mathematical biosciences·2010

Same author

Dynamic stability of spine using stability-based optimization and muscle spindle reflex.

IEEE transactions on neural systems and rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society·2008

Search research articles

Related Experiment Video

Updated: May 23, 2026

Importance of Jumping Ability in Handball Throwing Speed and Accuracy

Importance of Jumping Ability in Handball Throwing Speed and Accuracy

Published on: April 4, 2025

A simple strategy for jumping straight up.

Hooshang Hemami¹, Bostwick F Wyman

¹Department of Electrical and Computer Engineering, The Ohio State University, Columbus, OH 43210, USA. hemami.1@osu.edu

Mathematical Biosciences

|March 22, 2012

Summary

This study models the biomechanics of jumping, analyzing the transition from ground contact to free flight. Computer simulations demonstrate a control strategy for achieving a successful jump in humans and robots.

More Related Videos

Effects of a Novel Neuromuscular Training Intervention on Jump, Sprint, and Change of Direction in Adult Female Soccer Players

Effects of a Novel Neuromuscular Training Intervention on Jump, Sprint, and Change of Direction in Adult Female Soccer Players

Published on: June 10, 2025

A Training Program Using an Agility Ladder for Community-Dwelling Older Adults

A Training Program Using an Agility Ladder for Community-Dwelling Older Adults

Published on: March 7, 2020

Related Experiment Videos

Last Updated: May 23, 2026

Importance of Jumping Ability in Handball Throwing Speed and Accuracy

Importance of Jumping Ability in Handball Throwing Speed and Accuracy

Published on: April 4, 2025

Effects of a Novel Neuromuscular Training Intervention on Jump, Sprint, and Change of Direction in Adult Female Soccer Players

Effects of a Novel Neuromuscular Training Intervention on Jump, Sprint, and Change of Direction in Adult Female Soccer Players

Published on: June 10, 2025

A Training Program Using an Agility Ladder for Community-Dwelling Older Adults

A Training Program Using an Agility Ladder for Community-Dwelling Older Adults

Published on: March 7, 2020

Area of Science:

Robotics and Biomechanics
Human and Robot Locomotion

Background:

Jumping involves a complex transition from constrained, ground-based motion to unconstrained, aerial motion.
Understanding this transition is crucial for advancements in humanoid robotics and human performance analysis.

Purpose of the Study:

To develop a dynamic model for analyzing the mechanics of a simple jump.
To investigate the application of this model to a four-link, three-dimensional system representing humanoids.
To formulate and assess a control strategy for executing a jump.

Main Methods:

Expanded rigid body dynamics to model the jump transition.
Applied the formulation to a four-link, three-dimensional system.
Incorporated muscular system activity, focusing on major sagittal muscle groups.
Developed a control strategy using state feedback and central feedforward signals.
Utilized computer simulations to validate the model and control strategy.

Main Results:

The study successfully formulated the dynamics of jumping for a multi-link system.
Demonstrated the role of key muscle groups in generating propulsive forces.
Computer simulations confirmed the feasibility of the proposed control strategy for executing jumps.
The model effectively articulates the ballistic motion during the jump phase.

Conclusions:

The presented dynamic formulation and control strategy are feasible for modeling and executing jumps.
This research provides a foundational framework for developing advanced jumping capabilities in robots and humanoids.
Further research can build upon this model to explore more complex jumping maneuvers and optimize performance.