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HandWiki. Work. Encyclopedia. Available online: https://encyclopedia.pub/entry/31194 (accessed on 22 September 2026).
HandWiki. Work. Encyclopedia. Available at: https://encyclopedia.pub/entry/31194. Accessed September 22, 2026.
HandWiki. "Work" Encyclopedia, https://encyclopedia.pub/entry/31194 (accessed September 22, 2026).
HandWiki. (2022, October 25). Work. In Encyclopedia. https://encyclopedia.pub/entry/31194
HandWiki. "Work." Encyclopedia. Web. 25 October, 2022.
Work
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The content is sourced from: https://handwiki.org/wiki/Physics:Work

In physics, work is the energy transferred to or from an object via the application of force along a displacement. In its simplest form, it is often represented as the product of force and displacement. A force is said to do positive work if (when applied) it has a component in the direction of the displacement of the point of application. A force does negative work if it has a component opposite to the direction of the displacement at the point of application of the force. For example, when a ball is held above the ground and then dropped, the work done by the gravitational force on the ball as it falls is equal to the weight of the ball (a force) multiplied by the distance to the ground (a displacement). When the force F is constant and the angle between the force and the displacement s is θ, then the work done is given by: [math]\displaystyle{ W = F s \cos{\theta} }[/math] Work is a scalar quantity, so it has only magnitude and no direction. Work transfers energy from one place to another, or one form to another. The SI unit of work is the joule (J), the same unit as for energy.

gravitational force displacement force

References

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  6. Smeaton, John (1759). "Experimental Enquiry Concerning the Natural Powers of Water and Wind to Turn Mills and Other Machines Depending on a Circular Motion". Philosophical Transactions of the Royal Society 51: 105. doi:10.1098/rstl.1759.0019. https://royalsocietypublishing.org/doi/10.1098/rstl.1759.0019. 
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  8. Walker, Jearl; Halliday, David; Resnick, Robert (2011). Fundamentals of physics (9th ed.). Hoboken, NJ: Wiley. pp. 154. ISBN 9780470469118. 
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  10. Rogalski, Mircea S. (2018). Advanced University Physics (2nd ed.). Boca Raton: Chapman and Hall/CRC. ISBN 9781351991988. 
  11. "The Feynman Lectures on Physics Vol. I Ch. 14: Work and Potential Energy (conclusion)". https://feynmanlectures.caltech.edu/I_14.html. 
  12. Greenwood, Donald T. (1997). Classical dynamics. Mineola, N.Y.: Dover Publications. ISBN 9780486138794. 
  13. Resnick, Robert, Halliday, David (1966), Physics, Section 1–3 (Vol I and II, Combined edition), Wiley International Edition, Library of Congress Catalog Card No. 66-11527
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  15. J. R. Taylor, Classical Mechanics, University Science Books, 2005. https://books.google.com/books?id=P1kCtNr-pJsC&pg=PA117&lpg=PA117#v=onepage&q&f=false
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  17. Paul, Burton (1979) (in en). Kinematics and Dynamics of Planar Machinery. Prentice-Hall. ISBN 978-0-13-516062-6. https://books.google.com/books?id=3UdSAAAAMAAJ&q=instantaneous+power. 
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  19. "Work–energy principle". http://faculty.wwu.edu/vawter/PhysicsNet/Topics/Work/WorkEngergyTheorem.html. 
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