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Understanding Work in Physics: Definition, Units, and Calculations

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In physics, work is defined as the process of applying a force that causes a change in the position of an object. The unit of work is the Joule (J), which is equivalent to one Newton meter (1 N x 1 m). To calculate work, you can use the formula: Work = Force x Distance. For example, if a force of 120 Newtons moves a St. Bernard dog 3 meters, then the work done is calculated as 360 Joules. This guide covers various examples, helping you understand how to calculate work in different scenarios, including moving objects like file cabinets and pianos.

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Understanding Work in Physics: Definition, Units, and Calculations

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Presentation Transcript

  1. How do Scientists define work?

  2. Work is done when a force changes the position of an object.

  3. The unit for work is… Joule (J) = 1Nx 1m How would you write a formula to determine work?

  4. James Prescott Joule

  5. Work = Force x Distance Work Force Distance

  6. Morty applies a force of 120 Newtons to move his stubborn St. Bernard, Sir Drools A Lot, a distance of 3 meters. How much work did he do?

  7. A force of 350 Newtons is required to move a file cabinet 7 meters to the other side of the room. How much work is done?

  8. How far is a piano moved, by exerting a force of 720 Newtons, 5040 Joules of work are done?

  9. If 9 Joules of work was done to a soccer ball, what force was used to move that ball 3 meters?

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