There was a bonus word problem on my physics homework that i didnt know how to solve. its two masses, one on an incline plane connected tot he other hanging by a pulley. Heres a crudely drawn FBD of it. http://sketchtag.com/KS3pmhlzgq in the question Θ=37 m1=5kg and m2=6kg. assume no friction and find the acceleration and tension in the string. It says to use "special (picture of a triangle)" whats that mean. I looked up how to solve it and found that to find the normal force on an incline its Fn=mgsinΘ Can someone explain why this is? And I still havent solved it, but once i understand that part Ill try again before getting help.