An object of mass, M is dropped near the surface of the earth such that the gravitational field provides a constant downward force on the object. What happens to the center of mass of the earth-object system as the objects falls towards the earth? Does it       A) it moves towards the center of the earth  or                                                       B) It moves away from the center of the earth                                                  C) It does not move

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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.