# Problem: The electric motor of a model train accelerates the train from rest to 0.620 m/s in 21.0 ms. The total mass of the train is 875 g.(a) Find the minimum power delivered to the train by electrical transmission from the metal rails during the acceleration.(b) Why is it the minimum power?

###### FREE Expert Solution
92% (478 ratings)
###### FREE Expert Solution

Power is the rate of doing work and is given by:

$\overline{){\mathbf{P}}{\mathbf{=}}\frac{\mathbf{W}}{\mathbf{t}}}$

92% (478 ratings) ###### Problem Details

The electric motor of a model train accelerates the train from rest to 0.620 m/s in 21.0 ms. The total mass of the train is 875 g.

(a) Find the minimum power delivered to the train by electrical transmission from the metal rails during the acceleration.
(b) Why is it the minimum power?

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Our data indicates that this problem or a close variation was asked in Physics for Scientists and Engineers - Serway Calc 9th Edition. You can also practice Physics for Scientists and Engineers - Serway Calc 9th Edition practice problems.