Quick question: If a car speed increases, does its weight increase or decrease?

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wajed
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why? why not?
 
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Yes, because weight is related to relativistic mass, not rest mass? But I should really brush up on the submarine paradox before committing too strongly..
 
Yes, because gasoline is burnt and vented as exhaust. Unless it's not your normal car...
 
wajed said:
why? why not?

You must show your own work in order for us to help you on homework/coursework questions. What are your thoughts on why or why not?