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What are some ways to use elastic force to propel a cart across a floor?
.use two rubber band and nail them to a hared serfs and shoot the cart away.
What is the difference between mass and weight?
.well i think the difference between mass and weight is mass is weighted in kilograms and weight is weighted in pounds.
Article posted April 25, 2012 at 02:56 PM •
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I love how you explained how the forces worked
Comment Posted on April 30, 2012 at 02:22 PM by
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