when reality does not match your personal interpretation of scripture, it's not reality that's wrong, and it's not scripture that's wrong: it's your understanding that is at fault.
this is not true.
you will point me to an amateur on youtube, and if you really want, i'll pick apart the video and explain what's wrong with their testing procedure and how the equipment they use and what they point it at gives them the readings they get. make a new thread; that's not the subject of this one.
point me at the test you want to show me.
previously addressed, anyway. everywhere on the surface of a spherical planet is "locally level"
besides - you guys have this false description of optics that says light asymmetrically bends downward across distance, which is how you try to make sunsets and sunrises workable. so a laser-level would be affected by the same false optics, and if it indeed measures level, you've just destroyed your own argument for how the sun moon & stars can appear to rise & set.
gravity isn't what keeps a wet tennis ball, wet. surface tension of water & electrostatic forces in part keep water adhered to the fuzz on one. the ratio of the mass of a tennis ball to a water drop is nowhere near that of the whole earth and her atmosphere. the total weight of the atmosphere is about one millionth of the weight of the earth's land mass. if you want to accurately, you need to match that ratio, and study it in the absence of earth's gravity and in the absence of frictional forces.
a tennis ball is about 60 grams
a water drop is about 0.05 grams
one millionth of 60 grams is 0.00006 grams
the earth spins at one revolution per 24 hours. a single point on earth travels the diameter of the earth in 24 hours.
you want to match that with the tennis ball's angular speed:
the circumference of the earth is ~ 4 billion cm
the circumference of a tennis ball is ~ 21 cm
the earth spins around 167,000,000 cm per hour
so you want to spin the tennis ball at 1.67e[SUP]8[/SUP] * (21/4e[SUP]9[/SUP]) = 0.87675 cm per hour in order to properly scale the model.
so, you need to divide a single water drop into 1,000 parts
take 1/1000 of a single water drop and coat a tennis ball with it evenly
put the tennis ball & water in a vacuum chamber - no other air around it
take this whole apparatus and remove outside gravitational force from it: either take it into outer space or perform your test in an airplane while it is diving in free-fall
spin the tennis ball with the 1/1000 of a single drop of water evenly coating it at about 0.9 cm/hr - so it makes one full rotation in one day.
do this, and get back to me with whether the minuscule amount of water on the very slowly spinning ball in near-total vacuum in the absence of outside gravitational force "flies off"
simply put, spinning a tennis ball with a whole lot more water on it and a much faster rate in thick atmosphere and in the earth's giant gravitational field is totally inaccurate model.
yes, centripetal forces on earth exist. no, you're not modeling them right.
we don't feel velocity; we only feel acceleration, and the earth is in space, "suspended on nothing" ((another Biblical term)) - there is no "air" around the earth for us to 'push against' while we spin, so there is no friction to 'blow things off the surface' -- all this stuff has been explained many many times even in this thread alone.
your youtube teachers don't give you all the facts, and don't model things accurately. they give you half-truths, outright lies and carefully avoid mentioning a whole lot of information. they carefully craft arguments in order to deceive you, leaving out a whole lot of relevant details and literally lying about some others.
do the math, actually do it, with all the data, the right data, and take into account all the relevant variables, and you literally have zero arguments.