Determine the work performed by the electric locomotive in 2 hours of uniform movement of the train at an average speed of 54 km / h, if the traction force is 50 kN.
U – 54 km / h = 15 m / s
F – 50 kN = 50,000 N
t – 2 hours = 7200 sec
N = F • U = 50,000 N • 15 m / s = 750,000 W
A = N • t = 750,000 W • 7200 sec. = 5400000000 J = 5400 MJ
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