A block A of mass \( 7 \mathrm{~kg} \) is placed on a frictionless table. A thread tied to it pa...

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A block A of mass \( 7 \mathrm{~kg} \) is placed on a frictionless table. A thread tied to it passes over a frictionless pulley and carries a body \( \mathrm{B} \) of mass \( 3 \mathrm{~kg} \) at the other end. The acceleration of the system is (given \( g=10 \mathrm{~ms}^{-2} \) ) \( \quad \) [Kerala (Engg.) 2000]
(a) \( 100 \mathrm{~ms}^{-2} \)
(b) \( 3 m s^{-2} \)
(c) \( 10 \mathrm{~ms}^{-2} \)
(d) \( 30 \mathrm{~ms}^{-2} \)
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