Energy
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This chapter explores work, energy, and power in physical systems.

Key Concepts:
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- Work and kinetic energy
- Potential energy (gravitational, elastic)
- Conservation of energy
- Power

Sample Question:
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A 10 kg object is lifted 2 m. What is the increase in gravitational potential energy?

.. math::
   \Delta U = mgh = 10 \times 9.8 \times 2 = 196\ \text{J}