A train that weighs 1,000,000KG is moving at a stable speed of 20m/s with a force of friction that equals 20,000N.
Q: Find the power of the train's locomotive.
1
Expert's answer
2018-09-24T12:24:08-0400
The Newton’s second law states ma=F_(trein locomotive)-F_friction=0 Since a train moves with a stable speed, the acceleration a is zero. So F_(trein locomotive)=F_friction=20 000 N The power of the train's locomotive P=(work done)/time=(F_(trein locomotive)×distance)/time=F_friction×speed =20 000 N×20 m/s=400 000 W=400 kW
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