Quote:
Originally Posted by Rockter
these are free body diagrams here. This is what I do for a living.
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Rockter, so do I, but don't talk about it much...
speaking of simple body diagrams, maybe now you can see it. I couldn't make it any simpler. Mybe you are forgeting that the fulcrum is not the center of the boat, and instead is the center of bouyancy (I called it floatability before).
And in case you insist in the welded boom mast thing, I made a second diagram that includes the mast..
Off course the yeelow arrows are not at 90 degress as the oat is heeled by X and the forces applied are negative, not positive, as the force is pull not push.
Go on..try it..unless you don't agree with my models..
a) yellow arrows are constant forces, say 1.5 (any unit it doesn't matter) each to a total of 3
b) Total lenght of balance is 3 (again whatever you want to measure it with)
c) arm to the right is 1/3 of the arm to the left.
case 1 Traveler to the LEFT of the fulcrum
Traveler to the left F=W X moment arm
F = 3 x (1 + .5) = 9.6
(because the mast is to the left of fulcrum we have to add .5)
case 2 Traveler to the RIGHT of the fulcrum
Traveler to the left F=W X moment arm
F = 3 x (1.5 + .5) = 12
(because the mast is to the left of fulcrum we have to add .5