Go for the Gold!

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Use Physics to add as many gold coins as is possible to a bag without breaking the rope(s) from which the bag is suspended. Progress from level to level in this game-like challenge. But don't get too greedy for gold or you'll loose both the level and the gold. As they say, you "need to know when to hold them, know when to fold them, know when to walk away and ...". Ahhh! You know what I mean. Just get your calculator out and use Physics.