Y L8 Six blocks, of varying masses m, 2m, 3m, and 4m, are stacked as shown in the diagram. Each block is a cube with a length L on each side. (a) Find the x and y coordinates of the center of mass of the blocks. (b) Suppose a man with a mass of 5m is standing above the center of the block of mass 4m. He then moves MI. 1. Чт 2m down to the block of mass 3m, as shown. The blocks are all joined together, so they move together. The surface that the blocks are resting on is frictionless. Find the new x coordinate of 2 m the center of mass of the blocks.

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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.