Newton's Laws Exploration
Some notes: Theta was found through taking the arctangent of the quotient of the height and the base. The static frictional constant that I found was equal to .41399, as the one displayed on the poster used an incorrect or different frictional force to calculate it.
Observations:
The force of friction is parially determined not only in the direction of the net force, but also on the amount of force there is in a force whose direction is other than that of the nef force.