PBS
Pbs Nova: Relativity and the Cosmos
This well-written explanation of relativity includes animations and pictures which may be helpful in understanding a tough topic.
NASA
Nasa Space Place: El Space Place
NASA's space science site for kids - en Espanol. Features a wide range of activities, including games, projects, animations, and more. Also contains useful information on basic physics, chemistry, and other natural sciences, offering...
TeachEngineering
Teach Engineering: The Great Gravity Escape
Students use water balloons and a length of string to understand how gravity and the velocity of a spacecraft balance to form an orbit. They see that when the velocity becomes too great for gravity to hold onto an object, the object...
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,...
Georgia State University
Georgia State University: Hyper Physics: Kinetic Energy
This site from Georgia State University Physics Department defines kinetic energy and compares and contrasts it with other forms of energy. Provides an equation and links to further, more-detailed information.
Georgia State University
Georgia State University: Hyper Physics: Earth Orbits
An equation for the law of universal gravitation is stated. The weight equation (W=m*g) is related to the law. An interactive JavaScript form allows the user to practice determining the force of gravity and the acceleration of gravity...
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...
Other
University of Leicester: The Solar System
Resource explores the solar system, with an in depth discussion of each of the planets and their properties.
Georgia State University
Georgia State University: Hyper Physics: Mass, Weight, and Weightlessness
Site from HyperPhysics dealing with the topic of mass and weight. In addition the site deals with weightlessness. The numerous links to other pages help the student see how ideas are interrelated.
E-learning for Kids
E Learning for Kids: Science: Indian Ocean: What Kind of Natural Forces Do We Recognize?
Learn about forces (push or pull), gravity, and friction in this module by training dolphins.
University of Colorado
University of Colorado: Ph Et Interactive Simulations: Gravity and Orbits
Move the sun, earth, moon, and space station to see how it affects their gravitational forces and orbital paths. Visualize the sizes and distances between different heavenly bodies, and turn off gravity to see what would happen without it.
University of New South Wales (Australia)
University of New South Wales: School of Physics: Physclips: Gravity
Physiclips thoroughly presents the concepts of gravity with animations and film clips.
Texas Education Agency
Texas Gateway: Gravitational Force
[Accessible by TX Educators. Free Registration/Login Required] This resource provides flexible alternate or additional learning activities for students learning about the gravitational attraction between objects of different masses at...
Physics Aviary
Physics Aviary: Force Gravity From a Planet Lab
This mini lab was designed to visually illustrate the relationships between the force of gravity and the factors that determine its strength.
Science Struck
Science Struck: What Is Gravity and How Does It Work
A very detailed look at gravitational force and the many theories that have been put forward to try to explain it. Includes lots of illustrations.
Physics Classroom
The Physics Classroom: Vectors: Inclined Planes
Through examples and interactive practice problems, this physics tutorial helps students understand how forces behave on an object on an inclined plane.
Exploratorium
Exploratorium: Sport Science
In this colorful and interactive resource, students can learn about the science behind baseball, hockey, cycling, skateboarding, and surfing.
Texas Education Agency
Texas Gateway: Kinematics: Falling Objects
By the end of this section, you will be able to describe the effects of gravity on objects in motion, describe the motion of objects that are in free fall, and calculate the position and velocity of objects in free fall.
Texas Education Agency
Texas Gateway: Uniform Circular Motion and Gravitation: Centripetal Acceleration
By the end of this section, you will be able to establish the expression for centripetal acceleration and to explain the centrifuge.
eSchool Today
E School Today: All About Forces
Forces are everywhere. Learn what they are, the characteristics of forces, different kinds of forces, and factors that affect them.
Better Lesson
Better Lesson: Falling Objects
Students will determine if objects fall at the same speed by testing a variety of objects as they let them fall from above. They will learn that gravity is the force that is pulling on the object. Included in this lesson is a video about...
PBS
Pbs Learning Media: Centripetal Force: Roller Coaster Loops
This video segment explains centripetal force and illustrates how roller coasters rely on it to give you a thrilling ride. Includes background reading material and discussion questions. [4:40]
Discovery Education
Discovery Education: Rules of Forces and Motion
With this hands-on lesson, help students understand force, gravity, friction, and speed. Students will also learn how each of these concepts affects the another.
NASA
Nasa: Mass vs. Weight
Several learning modules that explain the difference between mass and weight. Each module includes a video introduction and detailed lesson plan.