A block A of mass 3 kg is attached to one end of a light inextensible string S₁. Another block B of mass 2 kg is attached to the other end of S₁, and is also attached to one end of another light inextensible string S₂. The other end of S₂ is attached to a fixed point O and the blocks hang in equilibrium below O (see diagram).

1. Find the tension in S₁ and the tension in S₂.

The string S₂ breaks and the particles fall. The air resistance on A is 1.6 N and the air resistance on B is 4 N.

2. Find the acceleration of the particles and the tension in S₁.