Newton's 3 laws of motion states that things want to stay in the position they are (inertia), until an outside force brings them into motion, and once that motion is enacted, it wants to stay in that motion until outside forces stop it. The first law is that things want to keep doing what they are already doing. His second law states that the acceleration of an object depends upon the mass of an object and the amount of force that's applied (force=mass x acceleration). The more mass there is, the more force is required to move said object. When the force of gravity is included in the equation, We have Fg=mg, where we can determine the weight of an object. Newton's third law states that for every action, there's an equal but opposite reaction.
These "laws" remained unchallenged for hundreds of years, until recently when the theory of gravity is now largely dismissed and considered outdated with research coming out concerning the supermassive black hole in the center of the milky way. The very nature of the way we thought gravity behaves is now insufficient in understanding the more complex relationships with the globe in relation to the solar system and the universe.
This taught me that no matter how much we think we know, we cannot be satisfied in calling things absolute, because there always seems to be something that can come and challenge and upset the status quo.
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I was talking to professor about this at the end of last class. I had said that everything that we're reading in text books as truth will likely be false in 100 years. The nice thing about that concepts is that there's so much research to be done.
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