University of St. Andrews (UK)
University of St. Andrews: Orbits and Gravitation
A page describing the physics, mathematics, and historical figures associated with planetary motion, satellite motion, and universal gravitation.
Boston University
Boston University: The Gravitational Field
Defines what a gravitational field is, its value, and how to calculate it. Field-line patterns are also drawn and explained.
Other
Fermi Laboratory:how Strong Is the Strong Force?
Use this site to learn about the four forces of nature. Also learn what determines the strength of a force. This question and answer site is a link of the Fermi National Accelerator Laboratory.
Khan Academy
Khan Academy: Newton's Law of Gravitation Review
Review the key concepts, equations, and skills for Newton's law of gravity, including how to find the gravitational field strength.
Exploratorium
Exploratorium: Science Snacks: Take It From the Top
Students defy gravity by stacking blocks in different ways in this exercise. Other projects are linked to this lesson as well.
Science Education Resource Center at Carleton College
Serc: Projectile and Satellite Orbits
This activity introduces gravity and Kepler's Laws and helps to develop an understanding of gravitational force, satellite orbits, and their dependence on the initial velocity.
Sophia Learning
Sophia: Gravity
This lesson will explain how gravity as a force as well as identify factors that affect the gravitation attraction between objects.
CK-12 Foundation
Ck 12: Kindergarten Science
[Free Registration/Login may be required to access all resource tools.] A science text for kindergarten that covers the weather and gravity.
Science Education Resource Center at Carleton College
Serc: Using Microsoft Excel to Explore Gravity Forces and Accelerations
Students will learn about the force of gravity and the factors that affect it, and use and analyze the universal gravitation equation using Excel spreadsheets.
Science Education Resource Center at Carleton College
Serc: Force and Motion: Gravity and Wind Resistance
Students investigate the effects of force on objects in motion particularly as it relates to gravity and wind resistance by performing a classroom egg-drop activity.
University of Colorado
University of Colorado: Ph Et Interactive Simulations: My Solar System
An interactive simulation that teaches about motion, acceleration, and velocity by allowing students to build their own solar system and watch the effects of gravitational pull and how that changes with initial position, velocity, and...
Exploratorium
Exploratorium: Your Weight on Other Worlds
From the Exploratorium Museum. Includes an interactive feature in which a visitor enters their weight on earth and has their weight on other planets computed and displayed. Discusses the distinction between mass and weight and describes...
Georgia State University
Georgia State University: Hyper Physics: Potential Energy
This site from Georgia State University Physics Department defines and explains the concept of potential energy. Using equations and graphics to illustrate the idea, it discusses the many types of potential energy (gravitational,...
Vision Learning
Visionlearning: An Experiment: Acceleration During Free Fall
Animated simulation re-enacts Galileo's experiment of dropping objects off the Leaning Tower of Pisa.
Concord Consortium
The Concord Consortium: Molecular Workbench: Rolling Down an Inclined Plane
Experiment with gravity as a variable to observe the effects of gravity on an object rolling down an inclined surface.
Lawrence Berkeley National Laboratory
Berkeley Lab: Four Fundamental Interactions
Discussion of the four fundamental forces of nature: strong interactions, weak interactions, gravity, and electromagnetism.
Georgia State University
Georgia State University: Hyper Physics: Circular Orbit
The necessity of gravitation to a circular orbit is discussed and equations for the orbital speed are derived from the law of universal gravitation. Binary systems in which two objects orbit about a center of mass are explained and...
Physics Classroom
The Physics Classroom: Cavendish and the Value of G
A short description of how Cavendish measured the value of G - the universal gravitation constant and supported Newton's theory. Illustrated.
Concord Consortium
The Concord Consortium: Molecular Workbench: Centrifugal Reaction Force
Adjust variables to see how a ball is affected by gravity while traveling around a circle.
Open Curriculum
Open Curriculum: The Nonmechanical Universe
Students learn about the fields of force and gravity in this illustrated article.
Physics Classroom
The Physics Classroom: Circular and Satellite Motion: The Value of G Interactive
Students investigate how the force of gravity varies with location on Earth. They are challenged to find the pattern in their findings.
TED Talks
Ted: Ted Ed: Free Falling in Outer Space
With a little help from Sir Isaac Newton, Matt J. Carlson explains the basic forces acting on an astronaut during a free fall. [2:59]
Wikimedia
Wikipedia: The Black Hole
This site examines the black hole as an object in astrophysics. Delve into this comprehensive resource that covers this concept from its history, to qualitative physics, the reality of black holes, mathematical physics and more.
American Association of Physics Teachers
Com Padre Digital Library: Open Source Physics: Sliding Down an Incline Plane
Here is a simulation demonstrating an object placed on an inclined plane. The user will vary the slope of the plane to see the relationship the slope has on the gravity of the object and the static friction.