Question

an engine pulls a train 1km over a level track . calculate the work done by the train given that the frictional resistance is 5*10^5 N​

Answer 1

Answer:

Given, frictional force, F=5×105 N ;

Displacement of the train, s=1km=1000m

Work done by the train against frictional force,

W=F×s=(5×105) (1000)=5×108 J.