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Section 7.3 - Work

Section 7.3 - Work. Work is a measure of the cumulative effect of a force in moving an object from one position to another. Pushing a box full of books down the hallway. Raising a bucket full of water from the bottom of a well. Pumping oil from the ground.

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Section 7.3 - Work

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  1. Section 7.3 - Work • Work is a measure of the cumulative effect of a force in moving an object from one position to another. • Pushing a box full of books down the hallway. • Raising a bucket full of water from the bottom of a well. • Pumping oil from the ground. • Launching a satellite into orbit.

  2. The Units Of Work Force  Distance = Work [pounds]  [feet] = [ft-lb] [Newtons]  [meters] = [N-m]

  3. The Work Integral In the simplest case, we have a constant force F applied to an object to move it in a straight line from point a to point b. In this situation, the work is F·(b a). Integral calculus provides us a way to compute work when the force exerted is not constant, but varies with position x (i.e., force is a function of x, written as F(x)).

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