Greetings you lot in [OT] land.

First, i dont get [OT] messages so please reply to me in person.

Now, for the question, one that i could probably solve while i was still at
school, but alas, that was many moons ago.

I have a bow ( u know - like in a bow and arrow ).

The lenght of the piece of "wood" and the length of the piece of string is
known.
Assume that the string is attached to the ends of the bow and that its curve
is contstant ( always circular - never eliptical.

How would i calculate the radius of the bow?

If i shorten the string by 10cm, how much will the radius change ?  Is the
change linear ? I dont think so.

John

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