Question

two blocks are connected by a string and pulled horizontally by a force F. suppose the string had a mass m, the blocks had masses m1 and m2 (the mass of the first being 1 and the second is 2). the acceleration on the last block is F/(m+m1+m2) which is the same as the acceleration for the whole system and the difference in the force of the connecting string at the connection point of block 1 and block 2 would be ma because its T1-T2 which is (m+m2)a-(m2)a = ma..... is that all correct?

Answer 1

I think it is!