Lafiel on 30 May 2017
to add to Johnw1104s explanation
the angular speed of every point in a 3D object rotating around an internal axis is equal in every point, which necessitates that the further away a point in the object is from said axis the higher would be the velocity in that point, as they travel a larger circle than axis-nearer points in the same amount of time
with the equator being the furthest from the earth's axis it does travel at the highest velocity around the earth's axis
ofcourse there is stress put on the system due to different points experiencing different velocities, but as long as the stress is smaller than the forces (or pseudo-forces) that hold it all together the object won't be destroyed
