What is the power of an engine required to move a train of mass 400 metric tons with a speed of 36 km/h, on a level track, if the force of friction is 10 N/metric ton?

An engine of 100 H.P draws a train of mass 200 metric ton with a velocity of 36 km // h . Find the coefficient of friction.

An engine of 100H.P draws a train of mass 100 metic ton with a velocity of 36km h^(-1) Find the coefficient of friction.

What is the power of an engine which can lift 20 metric ton of coal per hour from a mine 30 metres deep ?

Find the power of an engine which can draw a train of 400 metric ton up the inclined plane of 1 in 98 at the rate 10 ms^(-1) . The resistance due to friction acting on the train is 10 N per ton.