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## Homework Statement

Wasnt able to upload file, therefore an external link

https://drive.google.com/file/d/0B0FIIKckKOcKWFcxcmtJRVRXZTA/view?usp=drivesdk

A force F= mg is applied on C, all pullies are frictionless and we need to find the reading of the spring balance, basically the tension in it.

## Homework Equations

F=ma

## The Attempt at a Solution

I assumed the pulley and block A are moving downwards with an acceleration a1, then used pseudo forces to calculate acceleration of B and C which comes out to be

g/2. Then I used the equation for A T

_{spring }- 2mg=2ma1.

I need another equation relating tension in spring to that in wire connecting B and C.

2T

_{wire}=T

_{spring}?

Or i can consider the mass of pulley as that of the blocks combined which gives me 2T

_{wire}- T

_{spring}=2ma1? The pulley is massless, though.

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