Section 4.9. Using Newton's Laws II: Finding the motion.


2 comments so far...

Marie Huber-Roos July 31, 2010, 10:05 PM
He looks so concentrated :-)
Mary August 09, 2010, 09:12 PM
Soooooooooooooooo, cute...and more like Daddy every time I see a photo! Hope you're all well and enjoying the Summer. x
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