Origin of tides - equilibrium model
Newton proposed the first explanation for semidiurnal tides with his equilibrium model
In Newton’s equilibrium model:
- Earth & moon exist in isolation
- Earth is a non-rotating sphere
- Have a single ocean that encircles the globe
- Ocean is static, i.e. has no currents
- The only forces acting on ocean result from the movement of Earth & moon about their common center of mass