The larger the contact surface, the more friction.
The more uneven the surface, the more friction.
The material of the surface has also an effect on friction.
No: this is a common misconception Friction= Normal force* Coefficient of frictionwhere Normal force= Mass* Acceleration due to gravity* Cos(angle of surface)and the coefficient of friction is an...
well this is a simple answer and is very understandable.the answer is ...the affect is when two things rub against each other it makes a thing called friction and say if u where rubbing your hands on...