Friction depends on
- Nature of Surface - smooth or rough
- Weight of object on the surface
Nature of Surface
If surface is smooth, interlocking of both surfaces will be less. Thus, friction will be less
If surface is rough, interlocking of both surfaces will be more. Thus, friction will be more
Example
Concrete road is rough .If we run on it, we do not slip as there is more friction
Muddy road is smoother. if we run on it , we can slip as there is less friction
Example 2
In new shoes,soles are rough.So we can walk fast without falling
In old shoes,soles become smooth.So if we walk fast,we can slip
Weight of object on the surface
I t is easier to push a lighter box than a heavier box
