this question is doing my head in, and I bet it's more simple than I think:
Two particles, A and B, are connceted by a light inextensible string which passes over a smooth, fixed peg. The particle A, of mass 0.6 kg, is in contact with a smooth horizontal surface, and the particle B, of mass 0.1 kg, hangs freely above the ground. The system is released from rest with the string taut and A moves towards the peg.
It can be assumed that, during the subsequent motion, A does not reach the peg.
(a) while the particles move freely, the string is taut.
(i) Show that the acceleration of the particles is 1.4 ms/s
(ii) Find the tension in the string
(iii) Find the magnitude of the resultant force ont he peg due to the tension in the string.
Cheers