A train is traveling along straight, level track at 26.8m/s (60.0mi/h)....

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DoDoBird

New member
...Suddenly the engineer sees a truck? Here is the whole question:
A train is traveling along straight, level track at 26.8m/s (60.0mi/h). Suddenly the engineer sees a truck stalled on the tracks 185m ahead. If the maximum possible braking acceleration has magnitude 1.52m/s^2, can the train be stopped in time?
 
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kristie

Member
Using this kinematic equation, we can find the braking distance: V^2 = Vo^2 + 2ad

Substituting:
0 = (26.8)^2 + 2(-1.52)d
d = 236 m
Since braking distance > 185 m, then no, the train cannot be stopped in time!
 
K

kristie

Member
Using this kinematic equation, we can find the braking distance: V^2 = Vo^2 + 2ad

Substituting:
0 = (26.8)^2 + 2(-1.52)d
d = 236 m
Since braking distance > 185 m, then no, the train cannot be stopped in time!
 
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