**Product Type:** Video Learning Clip

**Audience: **Educators, Informal Education, Students

**Grade Levels: **5-8

**Year:** 2003

**Subjects:** Mathematics

This NASA video segment explores the concept of gravity and how Newton's three laws help rockets overcome the force of gravity. Viewers learn that gravity is a force of attraction between objects and that this force is dependent on the objects' masses. Viewers also learn that an object's mass remains constant, that unbalanced forces are needed to lift a rocket into space, and that the rocket will move in a direction that is equal and opposite to the thrust of the engine. Onscreen calculations show the amount of thrust needed for the Saturn V rocket of the Apollo program.

**Using Math and Science to Plan for the Next Generation of Spacecraft**

Duration: 5 minutes 36 seconds

> View QuickTime [18.6MB]

> View Windows Media [49.7MB]

> View Real Player [14.6MB]

**Other video learning clips in this series:**

Hands-on Activity in Rocket Building