This video takes a deeper look at what a slapshot is, and how the stick reacts to the given force. Also it explains the math behind a hockey stick and the flex of a stick, and how it may affect your shot. This is a good resource as they have professionals prove their theory. I also found this video explained the math very well, as it is easy to follow. This video will be extremely useful to me as it is an accurate resource, therefore will be a good place to gather data.