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A cannonball to explain escape velocity
posted April 8 2011 20:32.40 by Giorgos Lazaridis

April 2011 is the 50th anniversary of the first man in space, and the first complete orbit of the earth by a man in a spacecraft. Sixty Symbols uploaded a video explaining some things about orbiting spacecrafts. For me, this video, and a video from an older blog entry helped me understand what on earth is the "escape velocity". I always wondered, why a space shuttle must go that fast to escape from the gravitational force of the earth, is a simple "plane" could maintain a constant low speed and escape in space as well... The answer is much more complicated. I suggest you watch both videos, starting from the older post.

[Link: Sixty Symbols]
Tags: rocket   geometry/mathematics   revealed   history   theory/tutorial   science   space related   physics   

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