What is the physics behind the energy transferred in a 'rotating collision'?
Answers
It is not just that the paper becomes hard, it is the friction that does the cutting. Angle grinders spin very fast, the glue and 3 pieces of paper add some rigidity and if you add that to the 'centrifugal' forces it is tough enough to cut through many things. I was surprised it did not burn with the wood, you could see smoke from that cut and the wood was burned on the surface of the cut.
As Paul B said in the comments above the paper could have cut all those materials without the grinder if you could just move it fast enough. The way it cuts is by removing a very small amount of material at a time, it just does it very fast due to the rpms.
Heya...
Question _ What is the physics behind the energy transferred in a 'rotating collision ' ???
Answer :-
The physics that is behind the energy transfer in a rotating collision is the Centrifugal force....
How ___?
As a centrifugal force appears to act upon the moving bodies in a circular path and directed towards the centre of movement..
So that movement transfer the energy from the centre of motion to other boundaries of that path...
Thank you