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Q1. Two masses of 7kg and 3kg respectively are hanging on a frictionless pulley... Calculate the acceleration due to gravity...
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I think that your problem can be represented by this drawing: |dw:1444056374728:dw| here we can write the subsequent equations: \[\left\{ \begin{gathered} - {m_A}g + \tau = {m_A}a \hfill \\ - {m_B}g + \tau = - {m_B}a \hfill \\ \end{gathered} \right.\]
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