Question

If we imagine ideally smooth surfaces kept in contact, the frictional force acting between them is :

• A. zero
• B. a finite value but not zero
• C. very large
• D. we can’t predict

Answer 1

The correct option is A zero

If we imagine ideally smooth surface kept in contact, the frictional force acting between them is zero because there are no irregularities in the surface to interlock the other surface. Interlocking is the reason behind friction. Its absence means there will be no friction between these surfaces to resist the motion whenever they move relative to each other.