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 Chapter 3
Work, energy and power
LEARNING OBJECTIVES
In this chapter you will learn how to:
âunderstand the concepts of kinetic, gravitational potential and elastic potential energy
âunderstand work done as energy transferred
âunderstand power as the rate of energy transfer
âunderstand and apply the principle of energy conservation
âcalculate the efficiency in energy transfers.
GUIDING QUESTIONS
How are we led to the law of energy conservation, and how do we use it to describe changes in systems?