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Information Junky
Join Date: Mar 2001
Location: an island, upper left coast, USA
Posts: 73,167
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If a 1 kg wench goes down for a ride in a submarine, that 1kg wrench will still be a kg even though it is on a sub that can be considered to be weightless in the water.
This is because we typically consider weight to be the force measurement between solid objects. In this example, the force between the wrench and the sub bench that it rests, and the sub is weighed between the sub and the sea floor.
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Everyone you meet knows something you don't. - - - and a whole bunch of crap that is wrong.
Disclaimer: the above was 2¢ worth.
More information is available as my professional opinion, which is provided for an exorbitant fee. 
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