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Related Concept Videos

Free-falling Bodies: Example

Free-falling Bodies: Example

An object falling without any air resistance under the influence of gravitational force is said to be in free-fall. For free-falling bodies, the acceleration due to gravity is constant, irrespective of their mass. Free-fall is experienced not only by objects falling downward, but also by all objects whose motion is influenced by gravitational force alone. The dynamics of free-fall motion can be calculated using kinematic equations of motion, since free-fall acceleration is constant.
The...

Flail Chest-II

Flail Chest-II

Managing flail chest, a condition characterized by a segment of the chest wall moving independently from the rest of the thoracic cage, requires a comprehensive approach. It includes a thorough assessment of the patient's condition, a diagnostic evaluation to determine the extent of the injury, and the implementation of appropriate medical interventions tailored to the individual's needs.
Assessment:
1. Clinical Evaluation:
History:

Flail Chest-I

Flail Chest-I

Overview of Flail Chest
Flail chest is a severe and potentially life-threatening condition characterized by the fracture of three or more adjacent ribs in multiple places. It is most commonly caused by direct impacts and trauma, such as motor vehicle accidents or injuries from a steering wheel impact. It can also occur due to falls in elderly individuals with osteoporosis, or assaults involving sharp objects.
Pathophysiology
The pathophysiology of flail chest is complex, involving fractures of...

Free-falling Bodies: Introduction

Free-falling Bodies: Introduction

All objects, neglecting air resistance, fall with the same acceleration towards the Earth's center due to the force exerted by the Earth's gravity. This experimentally determined fact is unexpected because we are so accustomed to the effects of air resistance and friction that we expect light objects to fall slower than heavier ones. People believed that a heavier object had a greater acceleration when falling until Galileo Galilei (1564–1642) proved otherwise. We now know this is not the case.

Differential Equations: Problem Solving

Differential Equations: Problem Solving

When analyzing the motion of falling objects, it is essential to consider not only the force of gravity but also the opposing force of air resistance. A practical example involves releasing a heavy test weight during a safety check on a ship. As the weight falls from rest, gravity accelerates it downward while air resistance exerts an upward force that increases with velocity. This dynamic interplay of forces is well described by differential equations, which provide a mathematical framework...

Design Example: Designing Water Slide

Design Example: Designing Water Slide

When designing a water slide, controlling the speed of water flow is crucial for rider safety while maintaining an exciting experience. As water flows down the slide, gravity causes it to accelerate, with its speed at the bottom depending on the height from which it starts. The higher the slide, the more potential energy the water has at the top, which is converted into kinetic energy as it descends, increasing its speed.
Bernoulli's principle determines the water's velocity along the slide.

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Related Experiment Video

Updated: May 20, 2026

Design and Analysis for Fall Detection System Simplification

Design and Analysis for Fall Detection System Simplification

Published on: April 6, 2020

How to survive an 11-storey fall.

Emma L Hartley¹, Jonathan J Morrison, David A W Ritchie

¹Accident and Emergency Department, Victoria Infirmary, Glasgow, UK. emmalouisehartley@hotmail.com

BMJ Case Reports

|July 14, 2012

Summary

Survival after a high fall is rare. This case study details a patient

Area of Science:

Trauma Surgery
Emergency Medicine
Orthopedic Surgery

Background:

High-velocity trauma, such as falls from significant heights, typically results in severe injuries.
Survival rates for falls exceeding 100 feet are exceptionally low.

Observation:

A patient experienced an unusual survival after a fall exceeding 100 feet onto boggy ground.
The patient sustained severe polytrauma consistent with the fall height.

Findings:

Aggressive blood product resuscitation was critical in managing hemorrhagic shock.
Early application of a pelvic fixator stabilized the pelvic ring injury, facilitating resuscitation and patient stabilization.

Implications:

This case highlights the potential for survival even in extreme high-fall scenarios.

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Last Updated: May 20, 2026

Design and Analysis for Fall Detection System Simplification

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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

It underscores the importance of rapid, aggressive resuscitation and timely orthopedic intervention in polytrauma patients.

Boggy ground may offer a slight, but not definitive, protective effect in high-fall impacts.