Question

We can not reduce friction to zero by polishing surface or using lubricant. Give one example

Answer 1

NO THE FRICTION CANT BE TOTALLY ZERO IF WE EVEN LUBRICATED THE FLOOR

SO IT IS NOT CORRECT TO SAY THE FRICTION WILL BECOME ZERO

EG IF WE PUT OIL ON THE FLOOR AND LET GO A HOTWHEELS ON IT OR A RC THE HOTWHEEL/RC WILL STOP AT SOME INTANCE

SAME HERE WITH ICE