50 lorries with some load are connected back to back using non-extendable ropes. Suppose only first lorry is having an engine and that, it is capable of producing infinite torque (rotational energy).
a) Can this lorry convoy start moving with the help of first lorry only?
b)If your answer to the above question is NO, how a train engine pulls 50 bogies through less friction tracks?
Anwers are expected as comments