Circular Motion and Gravitation
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This chapter covers motion in circles and the law of universal gravitation.

Key Concepts:
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- Centripetal acceleration and force
- Newton's Law of Universal Gravitation
- Orbits and satellites

Sample Question:
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A 0.5 kg object moves in a circle of radius 2 m at 4 m/s. What is the centripetal force?

.. math::
   F_c = \frac{mv^2}{r} = \frac{0.5 \times 4^2}{2} = 4\ \text{N}