An engine pulls a train with a constant horizontal force of while the train moves on…
PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
An engine pulls a train with a constant horizontal force of 10kN while the train moves on a straight level track at 72km/h.
(i) Convert the speed of the train into SI units.
(ii) Calculate the power developed by the engine at this speed.
(iii) If the engine continues to supply the same force but the train speed is increased to 144km/h, find the new power developed and state how it compares with the original value.