Physics
posted by marco .
a train is moving at 45km/h when a coupling breaks and the last car separates from the train. as soon as the car separates, the brakes are automatically applied, locking all wheels of the runaway car and causing a uniform decelaration of 5 m/s^2. determine the distance the car travels before coming to a stop?

Vo = 45km/h = 45000m / 3600s=12.5 m/s = Initial velocity.
d = (Vf^2Vo^2)/2a,
d = (0(12.5)^2) / 10 = 15.63 m.
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