A toy train consisting of a locomotive and four carriages. The couplings between the carriages are magnetic.
A child pulls the train (locomotive) with a force of 2 N. Each car has mass 50g and the locomotive has mass 200g
D) If the child pulls the train with force F, then the train to go apart. In what connection?

The locomotive and cars are considered as particles and the friction can be neglected.
Motivation

Heart of Wales Line, Wales U.K. www.arrivatrainswales.co.uk
Inverness to Kyle of Lochalsh, Scotland, U.K.
Glasgow Queen Street to Fort William, Scotlsand U.K.
Great scenic routes
www.nationalrail.co.uk