Transcription of Chapter 7 – Kinetic energy, potential energy, work
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Chapter 7 Kinetic energy , potential energy , Work - Kinetic energy Work done by a constant force: Gravitational forceV. Work done by a variable Spring General: 1D, 3D, Work- Kinetic energy TheoremVI. PowerVII. potential energy energy of configurationVIII. Work and potential energyIX. Conservative / Non-conservative forcesX. Determining potential energy values: gravitational potential energy ,elastic potential energyI. Kinetic energyEnergy associated with the state of motion of an object.) (212mvK Units: 1 Joule = 1J = 1 kgm2/s2 = N mII.
force component perpendicular to the displacement does zero work. W F x d Fcos d F d (7.3) - Assumptions: 1) F=cte, 2) Object particle-like. 90 0 180 90 90 W W Units: 1 Joule = 1J = 1 kgm2/s2 A force does +W when it has a vector component in the same direction as the displacement, and –W when it has a vector component in the opposite direction.
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