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RATINGS: Sites are rated from 1 owl (good) to a high of 5 owls. Read more- From Apples to Orbits: The Gravity Story
The force of gravity is everywhere. Gravity is the weakest of the four fundamental forces, but it has a daily affect on everything and everybody. This comprehensive ThinkQuest-hosted website has clear graphics and explanations about gravity and the history of its definition. Don't miss the Grav Lab activities.
- Forces
When a force is applied to an object, the object will accelerate until the force is withdrawn. Once the force is withdrawn, the object will continue moving at a constant velocity until it encounters an opposing force. This online text from the School for Champions discusses force in everyday language. At the bottom of the page are some helpful links to suggestions for studying physics and improving grades.
The Mysterious Force at a Distance How do forces at a distance work, anyway?
- What Is a Force, Really?
Here's a look at the tour de force of the masters of force. Many unseen forces exist, including gravity, magnetism, and the forces that hold an atom together. Has anybody tried to explain why these forces exist and how they behave? Certainly, as this website proves, the nature of these phenomena has been a driving force (yuck, yuck!) behind scientific inquiry for centuries.
- The Meaning of Force
Forces are a bit of a mystery because they aren't visible — only their effects are visible. The Physics Classroom defines a force as an interaction among objects and classifies forces into two categories: contact forces, such as friction, and action-at-a-distance forces, such as gravity.
Meaning of Force
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