Question

it is easy to pull chair on a smooth surface then on a rough surface ​

Answer 1

Answer:

Rougher surfaces have more friction between them than smoother surfaces. ... Heavier objects press together with greater force, and this causes greater friction between them.

Answer 2

it is due to friction which acts in the opposite direction. we know that friction depends on the irregul arities of the two surfaces.it is easier to walk on rough surfaces because there is more friction while on smooth surfaces less friction is there.

it is the same as above answer you can change instead of walking.

hope this helps you dear :)