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Chapter 6: Work, Energy and Power

Chapter 6: Work, Energy and Power Tuesday February 10th Reading: up to page 88 in the text book (Ch. 6) Finish Newton s laws and circular motion Energy Work (definition) Examples of work Work and Kinetic Energy Conservative and non-conservative forces Work and Potential Energy Conservation of Energy As usual iclicker, examples and demonstrations Although the speed, v, does not change , the direction of the motion does, , the velocity, which is a vector, does change . Thus, there is an acceleration associated with the motion. We call this a centripetal acceleration. ac=v2rCentripetal acceleration: A vector that is always directed towards the center of the circular motion, , it s direction changes constantly.

net change in the kinetic net work done on ... F⋅! d More on Work To calculate the work done on an object by a force during a displacement, we use only the force component along the object's displacement. The force component perpendicular to the displacement does zero work

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Transcription of Chapter 6: Work, Energy and Power

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