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August 1, 2014

August 1, 2014

Posted by **Sydney** on Tuesday, September 13, 2011 at 10:05pm.

- Physics -
**drwls**, Tuesday, September 13, 2011 at 10:22pmFirst calculate the acceleration of the front of the train. When its velocity is V after traveling a distance X from a standing start,

V^2 = 2 a X, so

a = V^2 /(2X) = 1.198 m/s^2

When the last car passes the worker, the first car will have traveled 184 + 90 = 274 m

Use again V^2 = 2 a X, with the new value of X = 274. (a remains the same). This new V is the velocity of both the first and the last car at that time.

V^2 = 2*1.198*274

V = 25.6 m/s

- Physics -
**Anonymous**, Wednesday, September 19, 2012 at 4:46pmseriously bruh

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