section_path: Examples of forces in classical mechanics/Fictitious
section_name: Fictitious
paragraph_text: Fictitious
  
  There are forces that are frame dependent, meaning that they appear due to the adoption of non-Newtonian (that is, non-inertial) reference frames. Such forces include the centrifugal force and the Coriolis force. These forces are considered fictitious because they do not exist in frames of reference that are not accelerating. Because these forces are not genuine they are also referred to as "pseudo forces".
  
  In general relativity, gravity becomes a fictitious force that arises in situations where spacetime deviates from a flat geometry.