Friction Lab Report

Procedures: (1)
-gather all materials (small block of wood and a larger block of wood)
-place sand paper on one side of the small block of wood
-weigh the small block of wood
-place the block with the sand paper on the side onto the larger block of wood and angle the wood until the wood falls off.
-measure the angle of where the wood fell off.
-do the same for the block of wood that does not have the sand paper
-draw a free body diagram
-place all of you information(angles) onto the diagram
-use cosine and sin to get the vectors
-use cosine and sin for both of the different angles
-now draw two more free body diagrams.
-place the new information onto it.
-now use the formula U=Ff/Fn
-this will give you the new vectors for friction. (use this formula for both diagrams)
-Now...you are finished :)

2)THIS IS MY TABLE!
Go to this website :)
https://docs.google.com/spreadsheet/ccc?key=0AuLTcm7cYv6vdFd6X21wTWJaVjE2Tk5iNFMwbDJDOGc&hl=en_US
3)

Above are our calculations.Below is the smooth side falling off the ramp. 

(4) Conclusions
In conclusion, I learned how to find the friction of an object just by determining the angle of which it fell off of something, and then plugging it into various forms of equation. If we would have plugged either the opposite or hypotenuse into the wrong place, then our answers would have been wrong. This meaning that the vectors that we got would have been wrong, and friction would be wrong. You have to pay close attention to what information goes where. You can use this type of principle to determine the friction of speed a car was going before it wrecked. The cops could use this information to determine if the speed was legal or illegal. So therefore, the friction experiment is very useful.