22.1 Introduction
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22.2 Potential energy
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Chapter 22: Mechanical energy
22.1 Introduction (ESAHJ)
All objects have energy. The word energy comes from the Greek word energeia (ένέργεια), meaning activity or operation. Energy is closely linked to mass and cannot be created or destroyed. In this chapter we will consider gravitational potential and kinetic energy.
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22.2 Potential energy
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