80 railway wagons all of same mass `5xx10^(3)`kg are pulled by an engine with a force of `4xx10^(5)`N. The tension in the coupling between 30 th and st 31st wagon from the engine is :-

A train having 60 compartments is pulled by engine with a force 6xx10^(4) N. If mass of each compartment is 4000 kg the tension in the coupling between 40 th and 41st compartment is:

A railway engine of mass 50 tons is pulling a wagon of mass 40 tons with a force of 4500N . The resistance force acting is 1N per ton The tension in the coupling between the engine and the wagon is .

A railway engine of mass 50 tons is pulling a wagon of mass 40 tons with a force of 4500N. The resistance force acting is 1N per ton. The tension in the coupling between the engine and the wagon is

A railway engin of mass 50 tons is pulling a wagon of mass 40 tons with a force of 4500N. The resistance force acting is 1N per ton. The tension is the coupling between the engine and the wagon is

A ship of mass 3xx10^(7) kg at rest is pulled by a force of 5xx10^(4) N through a distance of 3m. Neglecting water resistance, the speed of ship is: