Fictitious force
A fictitious force, also called a pseudo force,[1] d'Alembert force[2][3] or inertial force,[4][5] is an apparent force that acts on all masses whose motion is described using a non-inertial frame of reference, such as a rotating reference frame.
The force F does not arise from any physical interaction between two objects, but rather from the acceleration a of the non-inertial reference frame itself.