If you were give an uknown mass and told to find it's mass w/out using a scale, how would u go about doing it. You have a meter stick, stopwatch, and 2 cars (which you can mass) w/ flat surfaces so you can put the unknown weight on it. I want to use the conservation of momentum in elastic collisions to figure out the unknown mass, but how would I go about incorprating the friction into it? any other info. would also be very helpful. Thanks.(adsbygoogle = window.adsbygoogle || []).push({});

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# Homework Help: Lab-calculating mass

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