No. The difference is almost too small to measure; about one part per million.Quite often, airplanes move along the equator toward the moon and against the moon when the sun is at the top and the tidal force would be noticed by pilots on fuel consumption and flight time .
Correct, sort of. The system that is Earth and Moon orbit the Sun at the same speed. Since the center of rotation of that system is not the center of mass of the Earth, then there's a little increase and decrease of orbital speed as measured from the Earth. Again, almost too small to measure.The role of the moon is indirect, creating an uneven orbital velocity of the Earth ..
There are over 4000 man made satellites orbiting the Earth. None of them "stopped." (Other than the ones that re-entered, of course.)It is believed that the tidal forces stopped the rotation of the moon, and now it rotates synchronously. But there are more than 300 known satellites and why they all stopped at the same time and where did the force that rotated the satellites go ...
The Earth is gradually slowing down due, in part, to the attraction of the Moon on the sea and air. Eventually it will stop and become tidally locked to the Moon. Estimates for this are in the ten billion year range. So no worries in the near term.If the "Lunar tidal current" existed, it would really quickly stop the rotation of the Earth, since enormous energy would be expended on the ebb and flow.
Matt Jaffe and Holger Muller of UC Berkeley have in fact measured the effect of the Moon's tidal acceleration on free particles.Tidal forces today are successfully used as a plug from many secrets of nature.
But in fact, they exist only theoretically, and in practice, not a single gravimetric device recorded them.
Here is some data for you:The acceleration of gravity at the equator is less than at the poles: at the equator is 978 Gal, and at the poles - 983 Gal.
There is no data on the fluctuation of tidal forces; if there were fluctuations, there would be data.
When the Moon is overhead you feel 9.79999883 m/s^2 of gravity. When the Moon is beneath you you feel 9.80000111 m/2^2 of gravity. (Assuming you are in a place where the normal acceleration is 9.8 m/2^2.)
Do you feel better now that you have the data?