A broken spaceship is located 10 km above the center of a large circular thin sheet of unknown dust. The sheet has a radius of 106 km and a density of 71011 kg/m2. The spaceship and the dust attract each other due to the gravitational force. a. Find the initial acceleration of the spaceship. b. Find the acceleration of the spaceship right before the spaceship hits the dust. c. What will the astronauts in the spaceship experience right before the spaceship hits the dust?

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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.