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nadja

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"I stand at the window of a railway carriage which is travelling uniformly, and drop a stone on the embankment, without throwing it. Then, disregarding the influence of the air resistance, I see the stone descend in a straight line. A pedestrian who observes the misdeed from the footpath notices that the stone falls to earth in a parabolic curve. I now ask: Do the "positions" traversed by the stone lie "in reality" on a straight line or on a parabola? Moreover, what is meant here by motion "in space" ? From the considerations of the previous section the answer is self-evident."

This is a quote from

Albert Einstein: Relativity

Part I: The Special Theory of Relativity, Space and Time in Classical Mechanics.

Could someone please explain to me why, to the pedestrian, the stone falls in a parabolic curve and what type of parabolic curve it is? thank you

This is a quote from

Albert Einstein: Relativity

Part I: The Special Theory of Relativity, Space and Time in Classical Mechanics.

Could someone please explain to me why, to the pedestrian, the stone falls in a parabolic curve and what type of parabolic curve it is? thank you

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