Contact and Non-contact forces

• define force?


  push or a pull that acts on an object due to the interaction with another object
• force is a vector quantity
• unit for force?


  N
• what is contact force?

  when 2 objects are physically touching
• example of contact forces?


  Friction, tension, normal force.
• what is friction?


  he force felt between two surfaces when one attempts to slide against the other 
• what is air resistance?

  he force that acts in the opposite direction to an object moving through the air
• what is tension?


  An object that is being stretched
• what is normal contact force?

  when 2 objects are in direct contact
• what is non-contact force?

  when two objects are physically separated like gravitational and electrostatic forces
• what is gravitational force?


  force of gravity
• what is electrostatic force?

  Force between electrically charged objects.