When an elastic rod with a rotating clamp behaves as a deformable compass or as a deformable catapult?
This behaviour depends on the load applied at the free end!!
Enjoy the elastica compass and the elastica catapult at http://www.ing.unitn.it/~bigoni/catapult.html
More information about my research activity can be found in http://www.ing.unitn.it/~bigoni/
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