What is the speed of the 40 ton car relative to the ground?
Friday, January 15th, 2010DMDil asked: A 40 ton rail car and a 70 ton rail car, initially at rest, are connected together with a giant but massless compressed spring between them. When released, the 40 ton car is pushed away at a speed of 3.5 m/s relative to the 70 ton car. ...