2. A very light taut rope is attached to a box with mass mA=3.0 kg that rests on a tabletop with us = 0.25 and uk = 0.20. The rope passes over a frictionless, massless pulley and another box with mass mB = 1.0kg is attached to the other end of the rope. What is the acceleration of the blocks

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A:

Q: 2. A 0.99 kg ball is connected by means of two ideal strings to a vertical, rotating rod. The…

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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.