Contact and Non-contact Forces

Question 1

Types of forces

Answer 1

Contact and non-contact forces

Question 2

Examples of contact forces

Answer 2

• Buoyancy
  
  • The buoyant force is the upward force on an object fully or partly immersed in a fluid.
• Normal Forces
  
  • the support force exerted upon an object that is in contact with another stable object (box on table)
• Friction
  
  • the force exerted by a surface as an object moves across it or makes an effort to move across it
• Tension
  
  • the force that is transmitted through a string, rope, cable or wire when it is pulled tight by forces acting from opposite ends

Question 3

Examples of non-contact forces

Answer 3

• Gravitation
  
  • a force that attracts any two objects with mass
• Electrostatic force
  
  • attraction or repulsion that arises between electrically charged particles because of their motion
• Magnetism

Question 4

What is air resistance

Answer 4

Frictional force that acts upon objects as they travel through the air

Question 5

Spring force

Answer 5

The force exerted by a compressed or stretched spring upon any object that is attached to it

Question 6

Applied force

Answer 6

Force that is applied to an object by a person or another object

Question 7

Difference between contact and non-contact

Answer 7

• Contact force occurs due to the contact between two different objects.
• Non-contact force occurs due to either attraction or repulsion between two objects such that there is no contact between these objects.