The speed of a meteor approaching the earth is measured as 100 m/s at a distance of 900 km from the earth's surface. At what speed does this meteor strike the earth's surface? (W=6.67x10^-11Nm2/kg2, m(earth)=5.97x10^24kg)    a) 2780 m/s  B) 4220 m/s  NS) 1665 m/s  D) 7210 m/s  TO) 3976 m/s

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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.