Tensions Problem: 2 ropes and 3 blocks

[JANGurTHANG]

Homework Statement

The diagram is here http://img375.imageshack.us/img375/5...ionproblem.png

What is the tension in the cord connecting B and C? How far does A move in the first 0.250 seconds of movement assuming it does not reach the pulley?

Homework Equations

F=ma

The Attempt at a Solution

Tension1=(Mass of A)(acceleration)
Tension1 - (Mass of B)(gravity)=(Mass of B)(acceleration)

 

[dreamLord]

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