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Elastic force an gravety
To get a cart across the floor using a rubber back I'd use a slingshot.
Mass depends on what the item is and weight is how heavy an object is.
- Hyper
P.s.
My new pen name is HYPER=http://!!!!
Article posted April 25, 2012 at 01:46 PM •
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The computer you are commenting from has an id number. It is 107.22.25.119!
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