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Two trains are on a collision course along the x axis. The first train starts at...

Two trains are on a collision course along the x axis. The first train starts at the origin and moves with constant velocity v1=3.8 m/s. The second train starts from rest at some unknown positive x position D, and accelerates with a2=-0.70 m/s2 . The trains collide in a time t=22 s. Find the distance D.

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