What is the Principle of Relativity?
Q: What is the Principle of Relativity?
A: The Principle of Relativity states that the equations describing the laws of physics are the same in all frames of reference.
Q: Who first proposed this principle?
A: Greek philosopher Aristotle first proposed this principle in 300 BCE.
Q: What did Galileo Galilei prove?
A: Galileo Galilei proved that all objects fall with the same acceleration, regardless of their mass.
Q: How did Galileo's discoveries give birth to modern science?
A: Galileo's discoveries and Newton's Laws of Motion developed mathematically gave birth to modern science.
Q: What does it mean if two trains are moving at the same speed in the same direction?
A: If two trains are moving at the same speed in the same direction, then a passenger in either train will not be able to notice that either train is moving. However, if they take a fixed frame of reference (like Earth), they will be able to notice its motion.
Q: How do Newton's Laws apply when speeds approach light velocity?
A: When speeds approach light velocity, it is necessary to apply Einstein's Special Theory of Relativity instead of Newton's Laws of Motion because these laws only remain mechanically accurate for speeds that are slow compared with light velocity.
