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Thank you all for your input. I have updated the table. Is this good?
https://drive.google.com/file/d/140O01X ... sp=sharing

Hello, For my data tables, I used Trial Number vs Weight Ratio and Trial Number vs Distance Ratio for each ratio such as 2:1, 3:2, etc. I linked the table below. Is this sufficient for the competition if I make one for each ratio? https://drive.google.com/file/d/16L8OthmejIxoa4lU4VuY3sWgOCfOuiAp/vie...

Thank you for your help!

I built a prototype with a meter stick as the beam. Would this be a good material for the event as well, or will I need to use metal? From the rules, I understand the maximum weight the beam should bear is 800 grams. Will a wooden beam be fine for carrying this weight?

I recorded values with a 200-gram counterweight and received the correct ratios with a 0.3 margin of error. Thank you for all your help. https://drive.google.com/file/d/0B1EbHXDF4nqqSnR5dVhVdk1vRElkc1pnUlVNMERJYk1qSWNz/view?usp=sharing https://drive.google.com/file/d/0B1EbHXDF4nqqRC16NGZXNEpnSGNCV0l...

Then, should you use the counterweight while testing, or take it off before putting the masses on? Thank you for taking time to look at my question!

My design for the Class 1 Lever is shown below. However, when I tried testing it, the ratio of weights wasn't the same the distance to the fulcrum ratio. In fact, it was far off. For the fulcrum, I drilled a hole and used a threaded screw to attach a meter stick cut to 79.5 cm length. The weight rat...

Ok. Thank you.

During the competition, are the unknown weights going to be Ball Bearings or solid single weights? If I use a simple container to hold the weights, they need to be centered or distributed uniformly. I did a trial with single solid weights and as they moved around the container, they affected the bal...

This is the first time I am doing this event for Division B. Any help is greatly appreciated. The power points say that in the practicing stage, you need a counter weight. When you take the measurements of two or more unknown masses, what is the purpose of the counterweight, or is the counterweight ...