Choosing acceleration vector directions on a test

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november1992
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Homework Statement


This was a question on my test. I had to choose the direction of the acceleration vector for each position. I was wondering if I chose the correct answers.
Diagram of a cart on a frictionless-looking track with three labelled positions: a slope down to a flat section, then a curve upward; a compass-style star of eight numbered directions is shown above.


Homework Equations



a = gsinθ

Ʃ[itex]F_{y}[/itex] = [itex]N_{1S}[/itex]( normal force) - [itex]W_{1E}[/itex] ( weight force)

The Attempt at a Solution



for position one I picked 4
for position two I picked none (there was an option for that)
for position three i picked 3
 
Yup, I agree with Villyer, they appear right to me as well. :-)