Makes grants to address the most serious social and environmental problems facing society, where risk capital, responsibly invested, may make a difference over time.
An independent federal agency created by Congress in 1950 to promote the progress of science.
King Saud University seeks to become a leader in educational and technological innovation, scientific discovery and creativity through fostering an atmosphere of intellectual inspiration and partnership for the prosperity of society.
The O'Donnell Foundation is devoted to building model programs to enhance the quality of education.
Forces and Motion
|Explore the forces at work when you try to push a filing cabinet. Create an applied force and see the resulting friction force and total force acting on the cabinet. Charts show the forces, position, velocity, and acceleration vs. time. View a Free Body Diagram of all the forces (including gravitational and normal forces).|
Sample Learning Goals
- Predict, qualitatively, how an external force will affect the speed and direction of an object's motion.
- Explain the effects with the help of a free body diagram.
- Use free body diagrams to draw position, velocity, acceleration and force graphs and vice versa.
- Explain how the graphs relate to one another.
- Given a scenario or a graph, sketch all four graphs.
Tips for Teachers
The teacher's guide (pdf) contains tips created by the PhET team.
You can submit your own ideas and activities.
Sun Java 1.5.0_15 or later
OS 10.5 or later
Sun Java 1.5.0_19 or later
|Sun Java 1.5.0_15 or later|
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