Question

the engine of a train has to apply a force of 5000 Newton to overcome friction to run at a uniform rate of 90 km per hour what is the power developed by the engine

Answer 1

here
force F = 5000 N
velocity v = 90 km/h = 25 m/s
Power is given by
P = F.v
P = 5000 N × 25 m/s = 125000 W
= 125 KW

Answer 2

Answer:

f=5000n

v=90kmph

v=25 m/s

p=fv

5000*25=125000w

125kwh