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I am currently in grade 11, in Australia. I have an assignment to be completed in the wind tunnel, where we could choose any topic we liked. We also needed to write a full report on it.

My lab partner and I decided to construct a rig for a discus (Sporting implement), and measure the drag and lift generated at angles incrementing by five degrees (0 - 50 degrees).

We have tabulated our results, but we are having trouble finding a formula that we could use in relation to this. Some other people in the class are looking up the formulas for lift and drag, and their respective coefficients, but I honestly do not feel those formula are necessary, as we do not need to find lift and drag, we need to find the total distance the discus has traveled.

My initial thought was to just use the formula for projection (Help here would be appreciated), and then, going by the fact that vectors can be added/subtracted, simply do that.

Does anyone have any ideas, or know of formulas that we could use? as it would be a great help!

Thanks,

Jay.