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The prelab assignment is to find two methods, and I have three, but fear the 3 hour lab period tomorrow might be dull if I only use these three.

Here are my methods in order of what I suppose are the most accurate:

1) Using a force probe(with the little hook on the end) and a known mass, determine the μk from dragging it across a surface. Use that determined coefficient drag the unknown mass across that same surface and get the mass.

2) Pick a spring capable of holding the unknown mass without warping, and use a force probe and a ruler to determine its spring coefficient. Use that coefficient to weigh the unknown mass.

3) Use a couple force carts(with magnets) and a motion sensor, determine the impulse (area under the force-time curve)and divide the impulse by the Δv. I have already done this method and it is finicky so I will try to avoid it.

That's all I can think of so far; if you have an idea and are not sure If we have covered it in class mention it anyways, and I'll read up on it in my physics book tonight.