Question

________ surface exert greater friction than liquid and gases​

Answer 1

Answer:

Solid surface exert greater friction than liquid and gases.

This is because as we know that rougher the surface greater the friction. Be it roughness or softness only solid can provide.

Explanation:

Hope it will make you easy to understand. If liked then follow me back!!

Answer 2

Answer:

Solid

Explanation:

Friction is greatest in the absent of lubrication,and since there is presence of fluid lubricant in fluid friction it has less friction as compared to solid friction,and in solid friction there is no presence of any lubricant.