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## Homework Statement

A 3.00-KG mass and a 10.0-KG mass are attached to opposite ends of a massless cord which is strung over a frictinoless pulley.

a) What is the acceleration of the two-mass system?

b) What is the tension in the cord?

## Homework Equations

F = net forces

Fg = force due to gravity

a = acceleration

m = mass

* = times (multiply)

g = gravity

Fg = m*g

F = ma

## The Attempt at a Solution

I tried to draw a free body diagram of the two objects as one system, subtracting the least massive object from the most massive object (10 kg minus 3 kg). I then found the Fg of the system and used it to find the acceleration, then found the tension force using the acceleration found. According to the answer key, I am off, could anyone please show me the light?