quote:
Originally posted by gif83
What I meant was the bottom chain doesn't move ONLY IF the top doesn't move. you are trying to work out whether or not the top part of the chain moves.
You can't say the top does't move because the bottom does as the bottom's movement is dependent on what's going on on top.
Since the chains ARE connected you can turn it the other way around too, that is pure logic and exactly the whole essence (and beauty?) of this method.
Neither the top or the bottom can move as long as the bottom or the top will not move. No need for equations, diagrams and maths (well except for: If A is B, then B is A).
quote:
Originally posted by gif83
I guess I found equations to be far less brain hurt 
bleh, as long as we agree the top chain wouldn't move
/ 
