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1028 Notes

# 1028 Notes - Momentum Conserved When And in which...

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10/28/09 Oregon State University PH 201, Lecture #14 Momentum: Conserved When? And in which direction(s) ? Note these reminders and tips about using the principle of the Conservation of Momentum (either linear or angular): The conservation principle holds only in an isolated system —where no external in fl uence exchanges momentum with any object within the system. Objects within the system can freely exchange momentum among one another. Direction matters in physics: A system may be isolated for mo- mentum in one axial direction while it is not isolated in the other. Thus it is possible, for example, that a system’s x -momentum may be conserved while its y -momentum is not.

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10/28/09 Oregon State University PH 201, Lecture #14 Exchanges of Linear Momentum: How Do They Happen? When any two masses interact, they transfer linear momentum: What one gains, the other loses. Look again at some past examples and see this in the numbers….
10/28/09 Oregon State University PH 201, Lecture #14 Two ice skaters have different masses ( m A = 60 kg; m B = 90 kg) and are standing together at rest on the level ice. Then they push against one another.

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1028 Notes - Momentum Conserved When And in which...

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