I wonder if someone might suggest an approach to solve this problem? A vehicle weighing 5000 lbs is moving at 10 mph and is struck from behind by a vehicle weighing 5000 lbs and moving at a high rate of speed. The slow-moving vehicle is pushed forward a distance of 150 feet. How fast was the high-speed vehicle traveling? I suspect we can apply momentum theory to solve this, but am having trouble getting started. Regards, Gordon.