The electric motor of a model train accelerates the train from rest to 0.760 m/s in 29.0 ms. The total mass of the train is 585 g. Find the average power delivered to the train during its acceleration.
I tried doing this problem and received 11648.3 Watts as my answer, but that's incorrect. I feel like it should be something a lot smaller though. I also want to know how you got the answer too. Thanks!
I tried doing this problem and received 11648.3 Watts as my answer, but that's incorrect. I feel like it should be something a lot smaller though. I also want to know how you got the answer too. Thanks!
-
The average power = (work) / (time). The work done by the electric motor = the change in kinetic energy (we assume the friction is negligibly small)
W =(m)(v^2)/2 = 0.1689 J. The time = 29.0x10^(-3) seconds. The average power is 5.8 W
PS. You may want to check if you converted all the numbers to SI units.
W =(m)(v^2)/2 = 0.1689 J. The time = 29.0x10^(-3) seconds. The average power is 5.8 W
PS. You may want to check if you converted all the numbers to SI units.