Confusion around the tidal force and the centrifugal force
Abstract
We discuss the tidal force, whose notion is sometimes misunderstood in the public domain literature. We discuss the tidal force exerted by a secondary point mass on an extended primary body such as the Earth. The tidal force arises because the gravitational force exerted on the extended body by the secondary mass is not uniform across the primary. In the derivation of the tidal force, the nonuniformity of the gravity is essential, and inertial forces such as the centrifugal force are not needed. Nevertheless, it is often asserted that the tidal force can be explained by the centrifugal force. If we literally take into account the centrifugal force, it would mislead us. We therefore also discuss the proper treatment of the centrifugal force.
 Publication:

arXiv eprints
 Pub Date:
 June 2015
 DOI:
 10.48550/arXiv.1506.04085
 arXiv:
 arXiv:1506.04085
 Bibcode:
 2015arXiv150604085M
 Keywords:

 Physics  Popular Physics
 EPrint:
 Bulletin of JEin Institute for Fundamental Science, Research Note 150113, 2015