what about this one ?
Regarding the video, the fact that you have to introduce opposing force (i.e. bouyancy) to counter the force of gravity ... demonstrates that there is a force of gravity.
We oppose the force of gravity in any number of processes. The compression strength of a wooden chair opposes the force of gravity when we sit. The propulsive force of a rocket will enable it to rise away from the earth despite the force of gravity. If we throw a ball up away from the earth, it will travel away from the earth at an ever decreasing speed until it finally stops and begins to fall toward the earth until it comes to the surface of the earth.
All of this is due to the force of gravity. We adapt to and attempt to circumvent the effects of gravity at all points in our existence on the earth.
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