Oh man, I remember Newtons, and dragging blocks with rope! atleast you aren't dealing with friction yet, let me tell you that is a blast... :P.
You should try and get your photo closer to the 150 kb limit, it will help with the small details.
come on, that looks like freshman physics! (probably with Mr. Rice) It's easy vectors. And where's your dot diagram!? (the upper right hand corner one is not for the middle diagram)
Focus and depth of field are poor. I like the idea, but maybe it could have been conveyed better if your head had actually been in the picture, like sitting at a desk with the same sheets of meaningless numbers splayed out in front of you. That might have given more of a focal point and interest to the viewer, whereas now it is just a flat image that doesn't hold much interest.