Answer to Question #172835 in Mechanics | Relativity for alto

Question #172835

The USS Enterprise approaches the planet Alpha Centaury 4 at a speed of 0.800 c. Captain Kirk observes an airplane runway on the planet to be 2.00 km long. The air controller on the planet says that the runway on the planet is how long


1
Expert's answer
2021-03-18T14:01:40-0400

according to the Lorentz contraction formula:\text{according to the Lorentz contraction formula:}

l1=l01v2c2l_1= l_0\sqrt{1-\frac{v^2}{c^2}}

where:\text{where:}

l1the length of an object in the system of an observer l_1- \text{the length of an object in the system of an observer }

moving with speed v\text{moving with speed }v

l0=l11v2c2l_0=\frac{l_1}{\sqrt{1-\frac{v^2}{c^2}}}

l0=200010.64c2c2=20000.63333ml_0=\frac{2000}{\sqrt{1-\frac{0.64c^2}{c^2}}}=\frac{2000}{0.6}\approx3333m

l0=3.3kml_0=3.3km

Answer: 3.3 km - air traffic controller response


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