- How do we describe motion?
- How is mass different from weight?
- How did Newton change our view of the universe?
- What are Newton's three laws of motion?
- What keeps a planet rotating and orbiting the Sun?
- Where do objects get their energy?
- What determines the strength of gravity?
- How does Newton's law of gravity extend Kepler's laws?
- How do gravity and energy allow us to understand orbits?
- How does gravity cause tides?
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