JAMB - Physics (2019 - No. 28)
The limiting frictional force between two surfaces depends on
I. the cohesive force of the material
II. the nature of the surfaces in contact
III. the relative velocity between the surfaces
I. the cohesive force of the material
II. the nature of the surfaces in contact
III. the relative velocity between the surfaces
I only
II only
III only
I & IV only
Paliwanag
- Friction depends on the nature of the surfaces in contact