Article and video report on astronauts aboard the International Space Station offering their congratulations to the film Gravity for its Oscar success.

Examine the factors that impact an astronaut's freefall in space. Differentiate between zero gravity, weightlessness and freefall.

Newton's First Law also called the law of inertia is the most important thing to realize about motion. This article offers more information on motion and explains solved problems involving Newton's First Law. Also included is a video...