In this video segment adapted from NOVA, NASA learns hard lessons from the first American attempt to do work while "walking" in space. The video also explores Newton's third law of motion. [4:50]

Do you know how much you are accelerating down toward the center of Earth? This video will explore how to use Newton's Law of Gravitation to figure it out. [8:37]

A video giving another example of how to calculate the force of gravity using Newton's Law of Gravitation. [8:16]

View this video that relates Newton's Law of Motion to the operation on airplanes. Learn how mass of a person can be calculated by dividing the weight of the person to the force of gravity. [12:08]

This video lesson highlights how science can be learned from daily life experiences. It emphasizes the ways in which simple laws of physics can be understood from personal observations and experiences, and in fact it demonstrates that we...

This video lesson explores Newton's Third Law of Motion through examination of several real world examples of this law in action, including that of a donkey cart - a site common in the streets of Pakistan. Students will understand that...

Sal Khan introduces us to Newton's Law of Gravitation in this video. [8:37]

This video lecture will use the Universal Law of Gravitation to calculate the acceleration due to gravity at the surface of the Earth. Video will then calculate the space station's acceleration due to gravity. [10:12]

Basics of gravity and the Law of Universal Gravitation. [15:42]

A discussion of gravity and Newton's Law of Gravitation. [8:37]

A second video on the topic of the law of gravitation. It examines gravitational forces on a planet and in space.

What's the different between a wind force and the force due to gravity? This video [4:02] covers both Newton's second law of motion and law of gravity.

Learn why objects fall to the ground with Newton's Law of Universal Gravitation as explained by this video. Video will explain history of discovery of the concept of gravity. It will also show how to solve for the force of gravity. [15:42]

Presents an analysis of a problem where a brick and a feather are dropped on the moon to see which would hit the ground sooner. This is compared to the gravity on the Earth, where the air resistance on the objects would produce a...

This video covers the basics of gravity and the Law of Universal Gravitation. [15:42]

Sal Khan discusses deriving displacement as a function of time, constant acceleration, and initial velocity in this video. [9:57]

From the The Electronic Universe Project web site. This page states and explains Kepler's three laws of planetary motion. Includes some downloadable movie clips and associated sound files. Discusses Ptolemy's attempt to explain...

Zog is introduced to Newton's basic laws of motion. By observing objects on earth and in space, Zog learns that nothing can start moving, speed up, slow down, change direction or stop unless a force is applied to it -- even if the force...

What is the acceleration due to gravity at the space station? [10:13]

Video lecture explains why astronauts appear weightless despite being near the Earth. [7:12]

A video exploring the acceleration due to gravity at the space station. [10:12]

Sal Khan uses two examples to explain why a smaller denser object of the same mass can exert a stronger gravitational pull. [8:13]

This video [4:36] will first explore a single particle under the influence of gravity. Click the link to check out the Effects lesson.

Sal Khan explains how a block of wood is kept stationary by the force of friction (correction made in next video). [8:40]