Homework Help: Physics

Posted by marco on Sunday, February 19, 2012 at 6:10pm.

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?

Physics - Henry, Tuesday, February 21, 2012 at 4:56pm
Vo = 45km/h = 45000m / 3600s=12.5 m/s = Initial velocity.

d = (Vf^2-Vo^2)/2a,
d = (0-(12.5)^2) / -10 = 15.63 m.

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