Wednesday, February 21, 2018

special relativity - Faster than light possibility?




According to general relativity, speed is relative, so for example if you are running at 20 km/h and a car passes you at 30 km/h, the runner is actually moving at 50 km/h relative to the car.


Now imagine that 2 spaceships are traveling both at 99% the speed of light, and they pass each other in a linear fashion. Could it be argued that from 1 spaceships perspective, you are traveling at 198% the speed of light relative to the other spaceship, according to special relativity, yet violating the constant speed of light?.




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classical mechanics - Moment of a force about a given axis (Torque) - Scalar or vectorial?

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