Friction Between Solid Surfaces

Question 1

Is it true that friction tries to prevent motion between two surfaces in contact?

Answer 1

True!

Question 2

What is friction?

Answer 2

A force which tries to prevent motion between two surfaces in contact

Question 3

Which ways does friction act?

Answer 3

• Acts parallel to the surfaces in contact

- In the opposite direction to motion

Question 4

What does the size of the frictional force depend on?

Answer 4

• Type of surfaces in contact

- How hard the surfaces are pressed together

Question 5

What creates friction?

Answer 5

• Surfaces which are uneven touch the other surface over a small area, small contact area.
• Creates huge pressures that welds surfaces together.
• Have to break the welds to slide over the page.
• This is friction.

Question 6

As well as opposing motion, what can friction also cause?

Answer 6

• Cause surfaces to heat up.

- Cause surfaces to eventually wear away