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

Free-body Diagram

Free-body Diagram

In mechanics, understanding the motion of objects is essential, and one tool that helps solve this problem is the free-body diagram. It is a simple but powerful graphical representation that succinctly represents all the forces acting on an object. A free-body diagram can represent a stationary or moving object, and is used in mechanics to explain the cause of an object's motion.
A free-body diagram transforms a complex problem into a simple representation, making it easy to understand the...

Free Body Diagrams: Examples

Free Body Diagrams: Examples

Solving problems that involve forces is easy using free-body diagrams. A free-body diagram is a sketch showing all the external forces that are acting on an object or system. The object or system is represented by a single isolated point (or free body). Only those forces acting on it that originate outside of the object or system—the external forces—are shown. The forces are represented by vectors extending outward from the free body. Imagine a person sitting on a chair. Here, the free-body...

Drawing Free-body Diagrams: Rules

Drawing Free-body Diagrams: Rules

The first step in describing and analyzing most phenomena in physics involves the careful drawing of a free-body diagram. Free-body diagrams are useful in analyzing forces acting on an object or system, and are employed extensively in the study and application of Newton's laws of motion. The steps to draw a free-body diagram are listed below:

Principle of Linear Impulse and Momentum for a Single Particle: Problem Solving

Principle of Linear Impulse and Momentum for a Single Particle: Problem Solving

Consider a wooden box and a cylinder of known masses m1 and m2, respectively, hanging from a ceiling with the help of a massless pulley system.

Introduction to force

Introduction to force

Consider water flowing from a nozzle to a turbine vane. As the water hits the turbine vane, it exerts a force that causes it to move along the flow of direction. Force is an impact that changes an object's motion, shape, or orientation. Forces can be caused by physical contact, such as a push or pull, or through non-contact interactions, such as magnetic or gravitational forces. Force is a vector quantity with both magnitude and direction, and is measured in newtons (N) in the SI unit system.

Boxplot

Boxplot

Box plots (also called box-and-whisker plots or box-whisker plots) give an excellent graphical image of the concentration of the data. They also show how far the extreme values are from most data. A box plot is constructed from five values: the minimum value, the first quartile, the median, the third quartile, and the maximum value. We use these values to compare how close other data values are to them. To construct a box plot, use a horizontal or vertical number line and a rectangular box. The...

You might also read

Related Articles

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

Sort by

Same author

On the nature of the interlayer magnetic interactions in biphase ferromagnetic films.

Scientific reports·2023

Same author

In vitro and in silico assessment of antitumor properties and biomolecular binding studies for two new complexes based on Ni<sup>II</sup> bearing k<sup>2</sup>N,S-donor ligands.

Materials science & engineering. C, Materials for biological applications·2021

Same author

Perturbative measurement of magnetoresistance.

The Review of scientific instruments·2019

Same author

Mixed inheritance in the genetic control of ramulosis (Colletotrichum gossypii var. cephalosporioides) resistance in cotton.

Genetics and molecular research : GMR·2016

Same author

Laparoscopic Implantation of Electrodes for Bilateral Neurmodulation of the Pudendal Nerves and S3 Nerve Roots for the Treatment of Pelvic Pain and Voiding Dysfunction.

Journal of minimally invasive gynecology·2016

Same author

Manual therapy for the management of pain and limited range of motion in subjects with signs and symptoms of temporomandibular disorder: a systematic review of randomised controlled trials.

Journal of oral rehabilitation·2015

Search research articles

Related Experiment Video

Updated: May 26, 2026

The Use of the Puzzle Box as a Means of Assessing the Efficacy of Environmental Enrichment

The Use of the Puzzle Box as a Means of Assessing the Efficacy of Environmental Enrichment

Published on: December 29, 2014

How is a box handled when all surfaces can be freely held?

A B Oliveira¹, L C C B Silva, E S L Pálinkás

¹Department of Physical Therapy, Universidade Federal de São Carlos (UFSCar), São Carlos, SP, Brazil. biaoliveira@ufscar.br

|December 20, 2011

Summary

Experienced workers use larger wrist extension when lifting boxes. This study examined box handling, grip, and force, suggesting improved designs for safer manual material handling and reduced injury risk.

More Related Videos

Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback

Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback

Published on: May 23, 2019

Rod-based Fabrication of Customizable Soft Robotic Pneumatic Gripper Devices for Delicate Tissue Manipulation

Rod-based Fabrication of Customizable Soft Robotic Pneumatic Gripper Devices for Delicate Tissue Manipulation

Published on: August 2, 2016

Related Experiment Videos

Last Updated: May 26, 2026

The Use of the Puzzle Box as a Means of Assessing the Efficacy of Environmental Enrichment

The Use of the Puzzle Box as a Means of Assessing the Efficacy of Environmental Enrichment

Published on: December 29, 2014

Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback

Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback

Published on: May 23, 2019

Rod-based Fabrication of Customizable Soft Robotic Pneumatic Gripper Devices for Delicate Tissue Manipulation

Rod-based Fabrication of Customizable Soft Robotic Pneumatic Gripper Devices for Delicate Tissue Manipulation

Published on: August 2, 2016

Area of Science:

Ergonomics
Biomechanics
Occupational Health

Background:

Manual material handling poses risks for upper-limb musculoskeletal disorders.
Understanding worker preferences and behaviors is crucial for designing safer handling practices.

Purpose of the Study:

To investigate how experienced and inexperienced subjects handle a box during lifting and lowering tasks.
To analyze wrist movements and grip force in relation to box handling and surface height.
To identify differences in handling techniques between experienced and inexperienced individuals.

Main Methods:

Subjects lifted and lowered an 11 kg box to high (HS) and low surfaces (LS).
Wrist movements and grip force were recorded using electrogoniometers and an instrumented box.
Analysis focused on grip strategy, wrist kinematics, and force application.

Main Results:

All subjects used a lateral-and-bottom grip, keeping wrist movements within safe limits.
Lowering to LS required less force than lifting to HS, which also induced greater ulnar deviation.
Experienced subjects exhibited greater peak wrist extension during lifting compared to inexperienced subjects.

Conclusions:

The adopted grip strategy is generally safe, but specific tasks (lifting to HS) induce greater wrist strain.
Differences in wrist extension between experienced and inexperienced handlers were observed.
Alternative box designs could further enhance safety and efficiency in manual material handling.