Solve Constrained Motion: Aa, Ab, Ac, Ad

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The discussion revolves around solving a constrained motion problem from an exam paper, focusing on the tensions in the strings. The user has calculated the accelerations as Aa = -10 m/s², Ad = -5 m/s², Ac = 20 m/s², and Ab = 0 m/s², and seeks confirmation of these values and guidance for part c, which involves calculating the tensions. The approach taken includes setting up equations based on the constraints of the system. The suggestion to apply Newton's second law for mass C to find the net force and subsequently the tensions is highlighted as a key step. Understanding the relationships between the accelerations and applying the correct physical laws will lead to the solution for part c.
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An old exam paper practice question. I can get up to b) but i am having trouble with the tensions.

I got for Aa=-10mms-2 Ad=-5mms-2, while Ac is given to be 20mms-2 and Ab=0mms-2.
Is this corrent and if so how do I go about solving question c?

This was done by creating the constraints.
2Aa + 2Ab + Ac = 0
2Ad - Aa - Ab = 0
 
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Welcome to PF!

Hi makeez! Welcome to PF! :smile:

(question c is the tension in the strings)

Start with good ol' Newton's second law for mass C … Fnet = ma :wink:
 

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