Work-Energy Theorem
We explain the work-energy theorem and solve an example problem involving the equations for work and kinetic energy. We also discuss when work has a positive or negative value.
We explain the work-energy theorem and solve an example problem involving the equations for work and kinetic energy. We also discuss when work has a positive or negative value.
Learning Objectives
-Define kinetic energy, work, and the work-energy theorem qualitatively and quantitatively.
-Discuss what happens when work done is positive or negative and how that affects an object’s change in kinetic energy.
-Define kinetic energy, work, and the work-energy theorem qualitatively and quantitatively.
-Discuss what happens when work done is positive or negative and how that affects an object’s change in kinetic energy.
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Vocabulary
energy - the ability to do work. kinetic energy (KE) - the energy of motion; equal to one half times mass times the square of the velocity of an object. work (W) - when a force causes displacement of an object. work-energy theorem - this theorem states that the work done on an object will either add kinetic energy to an object or take kinetic energy away; work is equal to an object’s change in kinetic energy.
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