A snake crawls from a hole to find food. It starts at 8 m SW; then goes 10 m 40o N of W; then sensed something moving 9 m S from where it is and moves to it. b. How far and in what direction was the moving object from the hole? c. If after realizing that the moving object was not good for food, the snake moved from it because it saw another moving thing, moved to its direction by covering a fourth unknown displacement and is now 20 m and 30o E of S from the hole. Determine the magnitude and direction of the fourth displacement?

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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.