The train, weighing 4,000 tons, began braking. The friction force is constant and equal to 2 x 10

The train, weighing 4,000 tons, began braking. The friction force is constant and equal to 2 x 10 (to the 5th degree) N. What was the speed of the train at the beginning of braking if it traveled 510 m in 1 minute?

F = mа
a = 0.05 m / s ^ 2
510 = 60v0 – 0.05 * 3600: 2
60v0 = 600 v0 = 10 m / s
Answer: 10 m / s



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