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Solved: A 12,600-kg railroad car travels alone on a level
Chapter 1, Problem 7P(choose chapter or problem)
QUESTION:
Problem 7P
A 12,600-kg railroad car travels alone on a level frictionless track with a constant speed of 18.0 m/s. A 5350-kg load, initially at rest, is dropped onto the car. What will be the car’s new speed?
Questions & Answers
QUESTION:
Problem 7P
A 12,600-kg railroad car travels alone on a level frictionless track with a constant speed of 18.0 m/s. A 5350-kg load, initially at rest, is dropped onto the car. What will be the car’s new speed?
ANSWER:Step 1 of 2
From the conservation of momentum, the initial momentum of a body can be equated to final momentum of the same body. The momentum can be expressed as,