Fall down of an long elastically vertically placed rod

[dodi8]

Let`s observe fall down of an long elastic vertically placed rod which has two point A and B. Point A is being placed on the ground and not moving, Point B is being free. We observe that the free ending is bending backwards and gets an arc shaped form. In your option, is it an optical illusion created from the velocity of free ending or is there rally a mechanical bending place? If there is a bending, what is the reason of its happening? Not mentioning here resistance of an air. P.S Sorry for my english

 

[BvU]

Hello dodi,

Google 'chimney breaks' -- it's the same root cause

 

[Chestermiller]

Let`s observe fall down of an long elastic vertically placed rod which has two point A and B. Point A is being placed on the ground and not moving, Point B is being free. We observe that the free ending is bending backwards and gets an arc shaped form. In your option, is it an optical illusion created from the velocity of free ending or is there rally a mechanical bending place? If there is a bending, what is the reason of its happening? Not mentioning here resistance of an air. P.S Sorry for my englishView attachment 219187

To answer this, here is a thought experiment: You hold the rod horizontally by applying simple supports at its ends. Does the rod curve anything like what you appear to observe when it is falling?

 

[dodi8]

Hello dodi,

Google 'chimney breaks' -- it's the same root cause

thank you for any attention

 

[dodi8]

To answer this, here is a thought experiment: You hold the rod horizontally by applying simple supports at its ends. Does the rod curve anything like what you appear to observe when it is falling?

thank you for answer. i think the rod does not curve anithing