Come to think of it, equating the acceleration of the system and the block is alright isn't it? They are both moving at the same acceleration which is all in the x direction.
If I let ma = Nsin(theta) because the forces in the vertical direction cancel, and then solve for "a" as I did... maybe...
Homework Statement
Hello all, kinda angry at myself for posting this but my brain has hit a brick wall.
This is an easy problem too... anyway.
A frictioness ramp of mass M and incline θ sits on a frictionless surface. A block of mass m sits on the ramp. What horizontal force F must be applied...