Two particles are moving uniformly in opposite directions along parallel trajectories. The distance between the trajectories is d, as shown. Find: a. The total linear momentum of the particles. b. The angular momentum of the particles with respect to point O. c. Repeat part b. for points O, and O2. d. Answer the questions a through c if p, = p.

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Proper Length

The theory of special relativity explains the connection between space and time to objects that move in a straight line at a constant speed. The objects move at the speed of light. When an object approaches light speed, its mass is endless and cannot move faster than light. The most crucial postulate of Einstein's special relativity is that the laws of nature do not change in each frame of reference.