Two automobiles A and B are approaching each other in adjacent highway lanes. At t=0 A and B are 0.62 mi a part, their speed are VA=60+0.2 (R) mi/hr and V g=30+0.2 (R) mi/hr and they are at point P and Q respectively. Knowing that A passes point Q 40 s after B was there and that B passes point P 42 s after A was there, determine (a) The uniform acceleration of A and B (b) When the vehicles passes each others (c) The speed of B at that time 0.62 ml

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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.