Jump to content

Friction of water in a river


Recommended Posts

I am interested how strong the friction is in a river which flows relatively fast, for example if you throw a key inside it or some other small metal peace, how long will it take til the friction starts removing atoms from the key and changing is physical structure. I am not talking about visual change, but when will the friction start removing layers from the stuff, since rivers are strong enough to even smoothen and remove stones after time.

 

I think the friction of it changes the surface of objects quickly, if the river flows fast.

Link to post
Share on other sites

I would say that the small metal piece would get carried away by the current rather than atoms being removed from it...

 

Any even if you fix it with something, the cohesive forces in a "small piece of metal" are quite large. The chance is much more likely that the current will break / interfere with a larger metal object before doing the same with a small one. Don't know if that explains it right. But a large object will break more likely than a small one...

Link to post
Share on other sites

I don't know RTP, don't you think that the small metal peace will lay on the ground and water will flow over it, since it is much heaver than metal and even small stones that are not very heavy are not moved by the water.

Link to post
Share on other sites

The friction of water against anything pales in comparison to the friction of sand and stones within the water.

In any river sands and stones will be carried along with the water and the amount of friction they have are effected by both the speed of the water and the quantity turned up by disturbances.

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...