Factors that Influence Friction

Question 1

What influences friction?

Answer 1

1) The materials in contact
2) The amount of force pushing the surfaces together; normal force.
3) Whether the surfaces are moving relative to each other or not.

Question 2

What components could change friction?

Answer 2

1) Mass
2) Nature of the surfaces
3) The weight

Question 3

If there is no force applied then…

Answer 3

there is no friction force.