description to below picture :

We have Car A and Car B
To Car I fixed wings
Wing A and wing B has got one common point
( It is point where wing A is contacting with wing B
IN THAT POINT EXIST FRICTION !!!)

During motion Wing A and Wing B are producing HOT
( and EM radiation)

HOW FAST IS MOVING "HOT POINT " respect to observer ?
What is the time ?
( how fast is working observer's clock and respect to what )




> FULL SCREEN (oryginal size photo )

Last edited by newton; 12/13/16 06:29 PM.