PHY100H1 Lecture Notes - Lecture 4: Special Relativity
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Lecture 4 - law of gravitation, newton"s laws, universality. What is the effect of a harder or softer swing? (cid:18559) people may think that a longer path equals shorter time (cid:18559) people may think shorter path equals shorter time. Actually no matter how far the pendulum swings it will take the same amount of time. Rotation in space: if we do the same experiment while rotating it/your position etc. Symmetry in velocity (my notes on the visual experiment) you and a friend are each on a train facing each other. Suppose there is a cup on a frictionless table in the rst train. If it is the rst train that is moving, the train slamming on the breaks would cause the cup to move. But if you were standing on the platform looking at the two trains, you would see the person on the rst train going backwards.
