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## Homework Statement

In Figure 5-52, three ballot boxes are connected by cords, one of which wraps over a pulley having negligible friction on its axle and negligible mass. The masses are mA = 30.0 kg, mB = 42.0 kg, and mC = 14.0 kg. When the assembly is released from rest, (a) what is the tension in the cord connecting B and C, and (b) how far does A move in the first 0.260 s (assuming it does not reach the pulley)?

... there is block a which is on the surface and block b and c are hanging over the edge pulling it down.

## Homework Equations

fnet = ma

T = ma

Fgc - T = ma

Fgb - T = ma

## The Attempt at a Solution

I'm not sure what i'm supposed to do, i thought of subtracting the equations, but i don't think that will work based on what i'm looking at and i dont think substitution of a variable t or a will work... help?