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Related Concept Videos

Stability of structures01:14

Stability of structures

In mechanical engineering, the stability of systems under various forces is critical for designing durable and efficient structures. One fundamental way to explore these concepts is by analyzing systems like two rods connected at a pivot point, O, with a torsional spring of spring constant k at the pivot point. This system is similar in appearance to a scissor jack used to change tires on a car. In this case, the arms of the linkage (equivalent to the rods in this system) are entirely vertical,...
Stability of Equilibrium Configuration: Problem Solving01:13

Stability of Equilibrium Configuration: Problem Solving

The stability of equilibrium configurations is an important concept in physics, engineering, and other related fields. In simple terms, it refers to the tendency of an object or system to return to its equilibrium position after being disturbed. The stability of an equilibrium configuration can be analyzed by considering the potential energy function of the system and examining its behavior near the equilibrium point.
Problem-solving in the context of the stability of equilibrium configuration...
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.
Deformation of Member under Multiple Loadings01:11

Deformation of Member under Multiple Loadings

When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
Buoyancy and Stability for Submerged and Floating Bodies01:11

Buoyancy and Stability for Submerged and Floating Bodies

In fluid mechanics, buoyancy and stability are key concepts for understanding the behavior of submerged and floating bodies. When a stationary body is fully or partially submerged in a fluid, the fluid exerts a force on the body known as the buoyant force. This force acts vertically upward through a point called the center of buoyancy, which is the center of the displaced fluid volume. According to Archimedes' principle, the magnitude of the buoyant force is equal to the weight of the fluid...

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Related Experiment Video

Updated: Jun 30, 2026

Method to Measure Tone of Axial and Proximal Muscle
10:41

Method to Measure Tone of Axial and Proximal Muscle

Published on: December 14, 2011

Dynamic stabilization of the trunk.

J A Porterfield

    The Journal of Orthopaedic and Sports Physical Therapy
    |January 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

    The lumbopelvic region is vulnerable to injury due to its weight-bearing role. Physical therapists can manage these injuries by assessing biomechanics and promoting soft tissue healing for optimal function.

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    08:16

    Movement Retraining using Real-time Feedback of Performance

    Published on: January 17, 2013

    Area of Science:

    • Orthopedics and Sports Physical Therapy
    • Biomechanics
    • Tissue Healing Science

    Background:

    • The lumbopelvic region is crucial for antigravity weight-bearing, making it susceptible to sprains and strains.
    • Incomplete control over injured tissue healing presents significant treatment challenges.
    • Decreased fitness and asymmetrical skeletal forces often predispose individuals to lumbopelvic injuries.

    Purpose of the Study:

    • To emphasize the critical need for accurate biomechanical assessment and understanding of soft tissue healing processes in the lumbopelvic region.
    • To advocate for physical therapists as the primary professionals to manage lumbopelvic injuries due to their expertise.
    • To present a rational approach for stabilizing and treating lumbopelvic conditions.

    Main Methods:

    • Assessment of injury biomechanics.
    • Understanding the basic science of soft tissue healing.
    • Developing goal-oriented treatment plans for functional restoration.

    Main Results:

    • Properly identifying and assessing biomechanics is critical for effective treatment.
    • Restoring normal function is essential to prevent reinjury and chronic symptoms.
    • A systematic approach is necessary to manage long-standing lumbopelvic pain and dysfunction.

    Conclusions:

    • Physical therapists are uniquely qualified to manage lumbopelvic injuries due to their knowledge of anatomy, biomechanics, and kinesiology.
    • Addressing underlying factors like decreased fitness and skeletal asymmetry is vital for prevention and treatment.
    • Effective stabilization and treatment strategies are essential for managing lumbopelvic conditions and restoring function.