Contact and Non-Contact Forces

Question 1

What is a contact force?

Answer 1

A force which acts between two objects that are touching eachother

Question 2

What is a non-contact force?

Answer 2

A force that acts between objects which are not touching eachother

Question 3

Name the four contact forces

Answer 3

1. Friction
2. Air resistance
3. Tension
4. Normal reaction force

Question 4

Name the three non-contact forces

Answer 4

1. Electrostatic
2. Magnetic
3. Gravitational

Question 5

How can you reduce the amount of friction between two surfaces?

Answer 5

Lubricate the sufrace
Smoothen the surface