Two blocks on string with 30-60-90 triangle at constant speed

[SqueeSpleen]

Homework Statement

There's two blocks of mass m_{A} and m_{B} which are linked by an ideal string. The block of mass A descends at constant speed. There's no friction. If the pulley is ideal, which one of the following is true[/B]

Homework Equations

Newton laws and trigonometry I think.[/B]

The Attempt at a Solution

I think that the correct answer is the second one, but the first one is marked as correct so I wanted a second opinion.
My reasoning is the following: If the speed is constant it means there is no acceleration, so the sum of the forces is 0. Then I decomposed gravity in the component that's compensated by the normal force done by the triangle and it's perpendicular component. So I arrived to
m_{A} (1/2) = m_{B} sqrt(3)/2
Now that I check, it isn't item 2. it would fall in item 1 as 1/sqrt(3) is between 0.25 and 0.6
Right?

sorry for the typos, I broke my keyboard yesterday (I won't drink coffee while on computer again) and I'm with a rubber one until a new one arrives, at least it's better thanthe one that windows have to use with the mouse.

[/B]

 

[TomHart]

Working it out very quickly, and thus prone to error, I think the first answer is correct.

 

[haruspex]

it would fall in item 1 as 1/sqrt(3) is between 0.25 and 0.6
Right?

Yes.

 

[AlphaLearner]

Absolutely correct! Way of solving by simply taking their Sine components of 'g' and solve it.