Particles A and B, of masses 0.4 kg and 0.1 kg respectively, are attached to the ends of a light inextensible string. Particle A is held at rest on a horizontal table with the string passing over a smooth pulley at the edge of the table. Particle B hangs vertically below the pulley (see diagram). The system is released from rest. In the subsequent motion a constant frictional force of magnitude 0.6N acts on A. Find
(i) the tension in the string,
(ii) the speed of B 1.5 s after it starts to move.
Solution:
Reference: PYQ - Oct/Nov 2003 Paper 4 Q5
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