A30 ton rail car and a 90 ton rail car, initially at rest, are connected together with a giant but massless compressed springbetween them. when released, the 30 ton car is pushed away at aspeed of 4.0 m/s relative to the 90 ton car. what is the speed ofthe 30 ton car relative to the ground?
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A30 ton rail car and a 90 ton rail car, initially at rest, are connected together with a giant but m...
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