hello my dear science fellas, many questions have been tangled my mind since quite a time.here it goes:

take a rope and swing it or keep swirling it for days together, you will see wear and tear in it, but why does earth see wear and tear though it revolves and rotates at moderately high speed and have keep doing it for years together. and even earth faces air friction due to the atmosphere around it. any help here??

The earth does experience some sort of wear and tear.

It's called weathering or, more strictly, erosion.

http://en.wikipedia.org/wiki/Erosion

thanks i got it,

a rope will experience wear and tear because it is flexing as you are spinning it. You are stressing and relaxing various strands repeatedly.

 

the earth does not experience the same as nothing is flexing (there isn't a bit of the earth held stationary(non-rotating).

 

The atmosphere is spinning with the earth and so erosion effects are limited to those caused by convection driven flows.

yes, my next question was supposed to be why limited erosion, i got it alien.