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Related Concept Videos

Rigid Body Equilibrium Problems - II01:21

Rigid Body Equilibrium Problems - II

A rigid body is in static equilibrium when the net force and the net torque acting on the system are equal to zero.
Consider two children sitting on a seesaw, which has negligible mass. The first child has a mass (m1) of 26 kg and sits at point A, which is 1.6 meters (r1) from the pivot point B; the second child has a mass (m2) of 32 kg and sits at point C. How far from the pivot point B should the second child sit (r2) to balance the seesaw?
Rigid Body Equilibrium Problems - I00:49

Rigid Body Equilibrium Problems - I

A rigid body is said to be in static equilibrium when the net force and the net torque acting on the system is equal to zero. To solve for rigid body equilibrium problems, do the following steps.

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Related Experiment Video

Updated: Jun 12, 2026

Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb
08:24

Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb

Published on: August 30, 2016

Stabilizing bipedal walking on posts through multiple constraints.

Kunishige Ohgane1, Kei-Ichi Ueda

  • 1Faculty of Mathematics, Kyushu University, Fukuoka 810-8586, Japan.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|May 21, 2010
PubMed
Summary
This summary is machine-generated.

Human locomotion adapts by self-producing movement constraints. This study explores how global variables coordinate initial states for adaptable bipedal walking, even on unstable surfaces.

Related Experiment Videos

Last Updated: Jun 12, 2026

Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb
08:24

Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb

Published on: August 30, 2016

Area of Science:

  • Dynamical systems theory applied to human locomotion.
  • Biomechanics and robotics of adaptive movement control.

Background:

  • Human locomotion exhibits remarkable adaptability, integrating environmental dynamics.
  • Previous work identified global variables coordinating initial states for self-produced constraints.

Purpose of the Study:

  • To expand the understanding of self-produced constraint mechanisms in human locomotion.
  • To investigate adaptability in bipedal walking on unstable posts.
  • To propose a novel framework for describing multiple self-produced constraints.

Main Methods:

  • Theoretical modeling using dynamical systems principles.
  • Analysis of initial state coordination and attractor basins.
  • Development of a multiple structure for self-produced constraints.

Main Results:

  • Global variables facilitate adaptation by coordinating initial states.
  • A mechanism for self-production of constraints is expanded to bipedal walking.
  • A framework for describing multiple self-produced constraints is proposed.

Conclusions:

  • The human locomotion system can autonomously produce and adapt its constraints.
  • This framework advances the understanding of adaptive locomotion and its control.
  • Findings have implications for robotics and prosthetic development.