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Related Concept Videos

Free-falling Bodies: Example01:05

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...
Weightlessness01:01

Weightlessness

When an object is dropped, it accelerates toward the center of the Earth. If the net external force on the object is its weight, it is said to be in free fall; that is, the only force acting on the object is gravity. Galileo was instrumental in showing that, in the absence of air resistance, all objects fall with the same acceleration g. However, when objects on the Earth fall downward, they are never truly in free fall, because there is always some upward resistance force from the air acting...
Free-falling Bodies: Introduction01:07

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 Solving01:21

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...
Region of Convergence01:17

Region of Convergence

The z-transform is a powerful mathematical tool used in the analysis of discrete-time signals and systems. It is a crucial tool in the analysis of discrete-time systems, but its convergence is limited to specific values of the complex variable z. This range of values, known as the Region of Convergence (ROC), is fundamental in determining the behavior and stability of a system or signal. The ROC defines the region in the complex plane where the z-transform converges, which can take various...
Energy Diagrams - II01:10

Energy Diagrams - II

Energy diagrams are important to understand the dynamics of a system. The topology of an energy diagram helps illustrate the equilibrium points of the system.
The point in the energy diagram at which the system’s potential energy is the lowest is known as the local minima. The system tends to stay in this position indefinitely unless acted upon by a net force. The slope of the potential energy diagram at the local minima is zero, indicating that zero net force is acting on the system. The slope...

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Updated: May 9, 2026

Impacts of Free-falling Spheres on a Deep Liquid Pool with Altered Fluid and Impactor Surface Conditions
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Impacts of Free-falling Spheres on a Deep Liquid Pool with Altered Fluid and Impactor Surface Conditions

Published on: February 17, 2019

The no-fall zone.

Lola Butcher

    Hospitals & Health Networks
    |July 27, 2013
    PubMed
    Summary
    This summary is machine-generated.

    Patient falls can be reduced through multifaceted hospital protocols. Leading institutions implement six key changes from the Institute for Healthcare Improvement to prevent patient falls effectively.

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    Area of Science:

    • Healthcare Quality Improvement
    • Patient Safety Research

    Background:

    • Patient falls represent a significant safety concern in healthcare settings.
    • Preventing patient falls is a critical objective for leading hospitals aiming to improve care quality.

    Purpose of the Study:

    • To outline multifaceted protocols for patient fall prevention.
    • To highlight six recommended changes by the Institute for Healthcare Improvement for reducing patient falls.

    Main Methods:

    • Review of leading hospital protocols for patient fall prevention.
    • Incorporation of recommendations from the Institute for Healthcare Improvement.

    Main Results:

    • Multifaceted protocols are essential for preventing patient falls.
    • Implementation of six specific changes can enhance fall prevention strategies.

    Conclusions:

    • While complete prevention is impossible, significant reductions in patient falls are achievable.
    • Adoption of evidence-based protocols can enhance patient safety and reduce fall incidents.