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yclark98563p5z2gt
05.05.2021 •
Physics
What do you mean by velocity ratio of a wheel and axle
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Ответ:
The normal reaction is
N = mg
= (9.8 m/s²)*(180,000 kg)
= 1764,000 N
The frictional resistance is
F = μN
= 0.002*1764,000
= 3528 N
The deceleration, a, caused by the frictional force is
a = (3528 N)/(180,000 kg)
= 0.0196 m/s²
The initial velocity of the train is 12 m/s.
The time, t, required for the train to coast to a stop is
(12 m/s) - (0.0196 m/s²)*(t s) = 0
t = 612.24 s
612.2 s