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Now, I haven't taken a physics course in something like 20 years, but I would like to be able to calculate (and graph) each moment of force acting on the bar throughout the movement. I will use this information, along with visual cues from watching the lift and the shape of the curve, to help correct flaws in my form, and to train using the correct exercises to perfect where I am weak in the movement.

The problem is, I simply cannot remember how to do this. Here is what I will know:

*The distance between each data point from frame to frame (I will be able to take take a known size, in this case, the diameter of the bar, and determine the what each pixel equates to).

*The time between each date point (1/30th of a second).

*The mass of the bar.

So can you help a dumb weightlifter figure out how I can graph how much force is acting on the bar from one data point to the next given that we will have a bar moving (from the perspective of the camera) in two dimensions?

Thanks for your help.