Particles A and B of masses mkg and (1 – m) kg respectively are attached to the ends of a light inextensible string which passes over a fixed smooth pulley. The system is released from rest with the straight parts of the string vertical. A moves vertically downwards and 0.3 seconds later it has speed 0.6 ms-1 Find
(i) the acceleration of A
(ii) the value of m and the tension in the string.