Centrifugal force is a virtual force introduced to solve the application problem of Newton's laws in non inertial frames. Originally, Newton's laws did not apply to non inertial reference frames. We introduced inertial centrifugal force in non inertial reference frames, so that formally Newton's second law still applies in non inertial frames. This helps to calculate the application of Newton's laws in non inertial frames. There is no centrifugal force in the inertial reference frame. In real life, centrifugal phenomena are widely present, such as the outward force felt by passengers when a car turns. In addition, the application of centrifugal force includes the high-speed spin drying function of washing machines, the use of centrifugal force by centrifuges to separate mixtures, and the artificial gravity generated by rotation in space stations.https://zoomkingzg.com/