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April 2, 2015

April 2, 2015

Posted by **Pat** on Wednesday, July 21, 2010 at 7:12am.

- Physics -
**tchrwill**, Wednesday, July 21, 2010 at 10:27amWith no braking, the trains would collide in t = 200/(25-15) = 20 sec.

At a decelerauon of 0.10m/sec.^2, the passenger train would come to a stop in Vf = 0 = 25 - 0.10t yielding t = 250 sec.

Since the time to impact is less than the time to the passenger train stopping, the two trains will collide when the freight train has traveled 300 m. and the passenger train has traveled 500m.

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