Tension & Pulleys: Force, Acceleration & Magnitude

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1) What force does a spring scale measure? (I measured several different masses in different ways using pulleys and the spring scale always came up with the same number of Newtons, is this tension or what?)

2) Why, even when two different sized masses are hanged upon a pulley, the spring scale comes up with the same number of Newtons? What does this say about the tension in the spring?

3) If two masses are hanged upon a pulley and one of them is greater, will the smaller one accelerate? If so, in what direction? What about the bigger one? How do they compare in magnitude, and explain this.

 

[K^2]

That sounds like homework. There is a section for homework help.

 

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Sorry, I just figured it belonged in here since most of those questions are calculation-based. I already posted it here if you can give it a shot:

https://www.physicsforums.com/showthread.php?p=3173188#post3173188