Contact and non-contact forces

• A force is a push or pull that acts on an object due to the interaction with another object
• contact forces

  the objects are physically touching
• non-contact forces

  the objects are physically separated
• examples of contact forces

  • friction
  • air resistance
  • tension
  • normal contact force
• examples of non-contact forces

  • gravity
  • electrostatic
  • magnetic
• Force is a vector quantity.