| Keyboard Shortcut | Action |
|---|---|
| Space | Pause/Play video playback |
| Enter | Pause/Play video playback |
| m | Mute/Unmute video volume |
| Up and Down arrows | Increase and decrease volume by 10% |
| Right and Left arrows | Seek forward or backward by 5 seconds |
| 0-9 | Fast seek to x% of the video. |
| f | Enter or exit fullscreen. (Note: To exit fullscreen in flash press the Esc key. |
| c | Press c to toggle captions on or off |
Working in Space
Newton's third law applies everywhere in the universe—even in space. This video shows why Newton's third law made things difficult for astronaut Gene Cernan. His work outside the spacecraft is what astronauts call an "extra vehicular activity," or EVA. Engineers at NASA used Newton's third law to design solutions to help counteract, or cancel out, the effects of zero gravity for future EVAs. Click on the left to watch the video.
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