d) Q: How can you tell from a velocity-time graph that you are moving in the negative direction e) Q: How is position-time graph different when moving faster versus moving slower? f) Q: How can you tell from a velocity-time graph when you are moving faster? g) Q: How do you move to create a horizontal line on a position graph? h) Q: How do you move to create a horizontal line on a velocity graph?

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Relativistic Energy and Momentum

According to classical physics, time flow is the same for every observer. But according to einstein's theory, time flow is different for different observers. The idea that time flow is not the same for all may sound strange because we may not experience this effect in everyday life. This effect is only observed when an object moves with some velocity comparable to the velocity of light. This velocity is termed relativistic velocity.