A Meter Stick Having a Rest Mass of 1 Kg

question 82

Multiple Choice

A meter stick having a rest mass of 1 kg moves past you. Your measurements show it to have a mass of 2 kg and a length of 1 m. How is the stick oriented, as observed by you?

• A) perpendicular to its direction of motion
• B) parallel to its direction of motion
• C) It is impossible to say anything about the orientation without further information.
• D) Nonsense-- if the stick's mass has increased to 2 kg, then it must be longer than 1 m.

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