[Free Registration/Login may be required to access all resource tools.] Using Newton's Law of Gravity and the equations of uniform circular motion, students solve problems involving the force of gravity.

An interactive simulation that teaches about gravitational force, circular motion, and astronomy by manipulating the sun, earth, moon, and a space station to observe the effects of gravity and orbital paths. This simulation can either be...

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.

[Free Registration/Login may be required to access all resource tools.] Definition of gravity and how it relates to weight. Includes a video. [3:54]

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]

In this interactive activity from NOVA, discover how centripetal force can affect you when riding in a car or flying at high speeds in a fighter jet.

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...

This activity can be used to explore forces acting on an object, to practice graphing experimental data, and/or to introduce the algebra concepts of slope and intercept of a line. A wooden 2x4 beam is set on top of two scales. Students...

In this animated video segment adapted from NASA, astronomer Doris Daou explains how the forces of speed and gravity keep the moon in a constant orbit around Earth. [1:36]

Fast turns around the track can become your laboratory tests in these experiments, whether you skate on ice, wood, or pavement. The goal is to determine which type of turns are best in a race - tight, medium, or wide - and then to figure...

Learn how different types of Earth processes change Earth's surface.

Explanation of the seemingly gravity-defying feats of a gyroscope. Focuses on the reason behind its operation. Includes illustrations.

The climate of our planet is greatly affected by Earth's oceans. Learn here about the different oceanic currents and the role those currents play on climate.

Third graders create their own parachutes to understand the concept of gravity and the effect it has on objects.

By the end of this section, you will be able to define buoyant force, state Archimedes' principle, understand why objects float or sink, and understand the relationship between density and Archimedes' principle.

Mechanical energy is the most easily understood form of energy for students. When there is mechanical energy involved, something moves. Mechanical energy is a very important concept to understand. Engineers need to know what happens when...

This personal site explains the physics of angular momentum and their application to flight. Part of a much larger site on the procedures, principles, and perceptions of flight.

An animation depicting the path of projectiles launched at various launch speeds from the fictional Newton's Mountain. Accompanying text discusses satellite motion and the requirements of orbital motion. Links to further information is...

An early astronaut's experiences teach students that Newton's third law of motion-for every action, there is an equal and opposite reaction-applies both on Earth and in outer space.

The orbits of satellites are described and an energy analysis is performed. Kinetic, potential and total mechanical energy are explained and applied to the motion of satellites.

Almost all of the energy that drives the various systems (climate systems, ecosystems, hydrologic systems, etc.) found on the Earth originates from the sun. Solar energy is created at the core of the sun when hydrogen atoms are fused...

Gravity is affected by the magnitude or size of the gravitational force between two objects and the masses and distance between them.

This interactive activity from NOVA Online lets you spin a spiral galaxy, including our own Milky Way. It demonstrates that what you can learn from visible light observations of a galaxy is largely determined by the angle from which you...

This site from NASA states Kepler's third law of motion and extends it to develop an equation for the velocity of an orbiting planet.