For more information about force and motion, check out the Science Trek website. You'll find it at ScienceTrek.org. Force and Motion: The Force of Gravity. Video has Closed Captions CC.

For more information about force and motion, check out the science trek website. You'll find it at science trek dot org. Force and Motion: Magnetic Pull or Push. Video has Closed Captions CC.

While there’s still little certainty as to the F-47’s true design geometry, we have a pretty good idea what the Air Force wants this jet to do and how it might go about accomplishing that.