S1
and S2 are light inextensible strings, and A and B are particles
each of mass 0.2 kg. Particle A is suspended from a fixed point O by the string
S1, and particle B is suspended from A by the string S2.
The
particles hang in equilibrium as shown in the diagram.
(i) Find
the tensions in S1 and S2.
The string S1
is cut and the particles fall. The air resistance acting on A is 0.4N and the
air resistance acting on B is 0.2N.
(ii) Find
the acceleration of the particles and the tension in S2.
Solution:
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