I like Serena Science Advisor Homework Helper MHB Messages 16,335 Reaction score 258 Jun 22, 2011 #2 Welcome to PF, me09! I think you can find the answer to your question in the first couple of lines of the wikipedia article: http://en.wikipedia.org/wiki/Vector_projection
Welcome to PF, me09! I think you can find the answer to your question in the first couple of lines of the wikipedia article: http://en.wikipedia.org/wiki/Vector_projection