Answer to Question #336083 in Physics for Student 11

Question #336083

A meter stick which is 100 cm is moving with an observed length of 60 cm. What is its speed?

Expert's answer

"l=l_0\\sqrt{1-v^2\/c^2}"

"v=c\\sqrt{1-(l\/l_0)^2}\\\\\n=c\\sqrt{1-(60\/100)^2}=0.8c"

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