A spaceship is 1600 m long when it is at rest. When it is traveling at a certain

Question

A spaceship is 1600 m long when it is at rest. When it is traveling at a certain constant speed its length is measured by external observers and it is found to be 1185 m.

What is the speed of the spaceship in terms of the speed of light? 2.01x108 Hints: Objects moving at relativistic speeds shrink in the direction of motion. This is the so called Lorentz contraction. What is the relationship between the spéed of the spaceship, its proper length and its contracted length? Submit Answer Incorrect. Tries 3/99 Previous Tries In the kitchen of the spaceship the chef sets the oven timer for 1.25 hours to make roast beef. How much time does the roast beef spend in the oven when measured by external observers at rest? Submit Answer Tries 0/99

Explanation / Answer

We have the following relationship:

V/c = ?[1 - 1185²/1600²] = 0.6718
Thus, v = 0.6719 c
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