First slide

Connected bodies

Question

In figure shown, both blocks are released from rest. The time to cross each other is

Moderate

Solution

    For A, 4g – T = 4a;
For B, T–1g = a ⇒ a = 3g/5
   a_AB = 6g/5 = 12 m/s²
     ⇒ 6 = 1/2 x 12 x t² ⇒ t = 1 sec

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