What mass composition can be set in motion by an electric locomotive weighing 180 tons
| September 26, 2021 | education
What mass composition can be set in motion by an electric locomotive weighing 180 tons, if the coefficient of sliding friction of the wheels on the rails is 0.2, and the coefficient of rolling resistance of the train1 is 0.006?
According to Newton’s second law, we get:
ma = k1 * m * g-k2 * M * g
k1 * m * g = k2 * M * g, where k1 is the coefficient of friction of the electric locomotive, k2 is the coefficient of rolling friction, m is the mass of the electric locomotive, M is the mass of the train.
then the train mass is:
M = k1 * m / k2 = 0.2 / 0.006 180 * 10 ^ 3 = 6000 * 10 ^ 3 = 6000 t
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