(4-56) The double Atwood machine shown in Fig. 4-48 has frictionless, massless pulleys and cords.

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(4-56) The double Atwood machine shown in Fig. 4-48 has frictionless, massless pulleys and cords. Determine (a) the acceleration of masses mA, mB, and mC, and (b) the tensions FTA and FTC in the cords.
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How is it possible that the lower pulley does not move with a constant acceleration while m_C does?

Based on what can you do with the addition of accelerations?

peacecop
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hi, sorry teacher, can I know how we can determine which box will accelerate downward and which box will accelerate upward since we didnt know the mass are ? Thanks .

iqraizzzahari
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hello professor, can we assume Ab=Ac-Ar instead?

gym