A \(12\,600\,\text{kg}\) railroad car travels alone on a level frictionless track with a constant speed of \(18.0\,\text{m/s}\). A \(5350\,\text{kg}\) load, initially at rest, is dropped onto the car. What will be the car’s new speed? • Nerd Notes

AP Physics 1

4.4 Elastic and Inelastic Collisions

4.3 Conservation of Linear Momentum

4.1 Linear Momentum

IntermediateGQMathematical20.5k

Railroad car before and after a load at rest is dropped onto it

A \(12\,600\,\text{kg}\) railroad car travels alone on a level frictionless track with a constant speed of \(18.0\,\text{m/s}\). A \(5350\,\text{kg}\) load, initially at rest, is dropped onto the car. What will be the car’s new speed?

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