The "Slap"

The "slap" noise that is heard during a slapshot is a combination of the stick hitting the ice and then the stick hitting the puck.  With a proper slapshot the blade of the stick strikes the ice roughly one foot in front of the puck.  When the stick strikes the ice the force causes the stick to flex.  Each hockey stick has a flex rating on them.  This rating is in pounds force needed to flex the stick one (1) inch.  My sticks are both rated at 100 flex.  As seen in the chart below the flex rating increases as the stick is bowed more and more. 
http://www.google.com/imgres?imgurl=&imgrefurl=http%3A%2F%2Fwww.modsquadhockey.com%2Fforums%2Findex.php%2Ftopic%2F52524-bauer-stick-flex-rating-is-after-cutting%2F&h=0&w=0&tbnid=4nyJlabKgw1PLM&zoom=1&tbnh=196&tbnw=257&docid=K05nw_ChPgODLM&tbm=isch&ei=ln5TU5G7B6mMyQHfiYHICw&ved=0CAUQsCUoAQ

These sticks are made to bow and bend without permanent deformation.  The top of the arc created by the stick bowing is centered about the bottom hand.

https://www.google.com/search?es_sm=122&biw=950&bih=934&tbm=isch&sa=1&q=hockey+stick+flex&oq=hockey+stick+flex&gs_l=img.3..0l2j0i5l7j0i24.6874651.6879346.0.6880700.16.12.0.0.0.1.193.1186.3j9.12.0....0...1c.1.41.img..15.1.123.k0apw8DfVYQ#facrc=_&imgdii=_&imgrc=OLwireeUNArIjM%253A%3BseTuXtCRaY7npM%3Bhttp%253A%252F%252Fcdn3.sbnation.com%252Fentry_photo_images%252F9080979%252FOvechkin_Shoots_On_Power_Play_gallery_post.JPG%3Bhttp%253A%252F%252Fwww.reddit.com%252Fr%252FPhysics%252Fcomments%252F21rxsi%252Fthe_physics_of_a_slapshot_is_a_bit_more%252F%3B900%3B600


This bow is important because it creates a whipping action that helps to accelerate the puck to a higher velocity.  Since we have the impulse of force we can now find out how much the stick deforms.

Once again there are a few things that must be assume:
This calculation is once again being made based on the player that was analyzed earlier, Zdona Chara.

His stick has a flex rating of  100.  This means that it takes 100 pounds of force to bend the stick 1 inch. 

This also means that once the pound force is converted to Newtons the new flex rating, or k, is 440 N/in (17513 N/m)

We must also assume that the total arc is less than 180 degrees or https://www.google.com/search?q=pi&source=lnms&tbm=isch&sa=X&ei=vHhUU7W3HIGFyQGJ24CwBA&ved=0CAgQ_AUoAQ&biw=950&bih=934#facrc=_&imgrc=I1WHsgPEGrK8kM%253A%3BuCPafIdnNOzQ1M%3Bhttp%253A%252F%252Fupload.wikimedia.org%252Fwikipedia%252Fcommons%252F2%252F2e%252FPi-symbol.svg%3Bhttp%253A%252F%252Fwww.huffingtonpost.com%252Fdavid-h-bailey%252Fpi-day-314-14_b_4851011.html%3B588%3B568.  For the purpose of simplicity I will use 75% of the arc so the angle is 3/4
https://www.google.com/search?q=pi&source=lnms&tbm=isch&sa=X&ei=vHhUU7W3HIGFyQGJ24CwBA&ved=0CAgQ_AUoAQ&biw=950&bih=934#facrc=_&imgrc=I1WHsgPEGrK8kM%253A%3BuCPafIdnNOzQ1M%3Bhttp%253A%252F%252Fupload.wikimedia.org%252Fwikipedia%252Fcommons%252F2%252F2e%252FPi-symbol.svg%3Bhttp%253A%252F%252Fwww.huffingtonpost.com%252Fdavid-h-bailey%252Fpi-day-314-14_b_4851011.html%3B588%3B568.

The following will give the height of the arc created by the stick during the wind up.



Now that we have the height of the arc we can find the deformation of the stick as it hits the puck.