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Related Concept Videos

Work01:22

Work

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Work is done when energy is transferred from one object to another. In other words, work is when a force acts on something that undergoes a displacement from one position to another. Forces can vary as a function of position, and displacements can be along various paths between two points. The increment of work (dW) done by a force acting through an infinitesimal displacement can be defined as the dot product of force () and displacement () vectors.
The dot product can be expressed in terms of...
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Work01:14

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Work is a fundamental concept of mechanical engineering and has many applications. Understanding how work is calculated and the different types of work can help us better understand physical processes and provide insights into complex problems.
Work is defined as the result of a force acting on an object, causing it to move along the line of action of force. It is also defined as the process of transferring energy through the application of force on an object, resulting in its displacement.
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Taping Over Different Ground Profiles01:12

Taping Over Different Ground Profiles

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Taping over varying ground profiles requires careful adaptation to achieve accurate measurements. On smooth, level ground with minimal vegetation, the tape can rest directly on the ground. Here, the taping team, typically consisting of a head and a rear tapeman, coordinates their positions with clear communication. The rear tapeman holds the tape at the starting point and guides the head tapeman toward a range pole placed beyond the endpoint, using hand or voice signals to ensure alignment.On...
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Power01:08

Power

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The concept of work involves force and displacement; meanwhile, the work-energy theorem relates the net work done on a body to the difference in its kinetic energy, calculated between two points on its trajectory. While none of these quantities or relations involves time explicitly, we know that the time available to accomplish work is often just as important as the amount of work itself. For example, sprinters in a race may have achieved the same velocity at the finish, therefore,...
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Social Loafing01:37

Social Loafing

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Another way in which a group presence can affect performance is social loafing—the exertion of less effort by a person working together with a group. Social loafing occurs when our individual performance cannot be evaluated separately from the group. Thus, group performance declines on easy tasks (Karau & Williams, 1993). Essentially individual group members loaf and let other group members pick up the slack. Because each individual’s efforts cannot be evaluated,...
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Quantifying Work02:30

Quantifying Work

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As a system undergoes a change, its internal energy can change, and energy can be transferred from the system to the surroundings, or from the surroundings to the system.
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Related Experiment Video

Updated: Mar 31, 2026

Design and Construction of an Urban Runoff Research Facility
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What does it take to get the job done?

Mihaela Serpe1

  • 1Unit on Cellular Communication, Program in Cellular Regulation and Metabolism, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892 mihaela.serpe@nih.gov.

Molecular Biology of the Cell
|October 31, 2015
PubMed
Summary

This essay reflects on the author's scientific journey, highlighting career-defining moments and valuable lessons learned. It aims to inspire future scientists by sharing personal experiences in cell biology research.

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Area of Science:

  • Cell Biology
  • Scientific Career Development

Background:

  • The author received the 2015 Women in Cell Biology Junior Award.
  • Personal reflection on a scientific career path.

Purpose of the Study:

  • To recount influential moments and experiences in the author's scientific trajectory.
  • To inspire aspiring scientists through shared personal anecdotes.

Main Methods:

  • Personal narrative and reflection.
  • Recounting of career-defining moments and lessons.

Main Results:

  • Identification of key experiences that shaped the author's scientific career.
  • Highlighting the importance of mentorship and memorable encounters.

Conclusions:

  • The author's journey in cell biology was significantly influenced by specific people and experiences.
  • Sharing these experiences can provide valuable insights and inspiration for others in the field.