A 20 kg object has an eastward momentum of 120 kg m/s. It encounters a westward impulse of 40 N*s. What is the magnitude of the final momentum of the object?
A 20 kg object has an eastward momentum of 120 kg m/s. It encounters a westward impulse of 40 N*s. What is the magnitude of the final momentum of the object?
Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter8: Momentum And Collisions
Section: Chapter Questions
Problem 7OQ: The momentum of an object is increased by a factor of 4 in magnitude. By what factor is its kinetic...
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A 20 kg object has an eastward momentum of 120 kg m/s. It encounters a westward impulse of 40 N*s. What is the magnitude of the final momentum of the object?
I get 80, but I know that's not right because it's not even one of the answer choices. Can someone explain how to do this?
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That's what I thought too! But the answer choices it gave were 8 m/s, 4 m/s, 2 m/s, and 6 m/s so I'm confused. I went with 8 and it was wrong.
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