This post has been sitting in my mind for quite some time. Really, it is about mechanics - not about pendulums. What is the goal in mechanics (classical mechanics, if you like)? Generally, it is to ...
In relation to Stuart Clark’s story on the Lagrangian points (21 February, p 30), the gravitational fields of the Earth and sun do not cancel each other at the Lagrange points. They add up to a net ...
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