A meter stick moving in a direction parallel to its length appears to be only 43.6 cm long to an observer. What is the meter stick's speed relative to the observer? (c = 3.00 × 108 m/s)

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A: Given: The speed of the space shuttle is 0.8c. The length of the space shuttle is 30 m.

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A: Use the inverse velocity transformation equation.

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Q: A pion is an unstable particle that has an average lifetime of 2.55 x 10$ s. This is the time…

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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.