Momentum conserved on inclined ramps?

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    Inclined Momentum
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Homework Help Overview

The discussion revolves around the conservation of momentum in the context of an object rolling down an inclined plane. The original poster questions whether momentum is conserved in this scenario, drawing a parallel to previous coursework focused on collisions.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants explore the definition of momentum conservation, particularly in relation to the forces acting on the system. There is a focus on whether the momentum of the object alone is conserved or if the entire system, including the ramp and Earth, should be considered.

Discussion Status

The discussion is examining the nuances of momentum conservation, with some participants clarifying the role of net force in determining conservation. There is an exploration of different interpretations regarding the system being analyzed.

Contextual Notes

Participants are considering the implications of net forces on momentum conservation, particularly in the context of a rolling object and its interaction with the ramp. The original poster's question stems from a broader understanding of momentum in collision scenarios.

aeromat
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Homework Statement


Is momentum conserved if an object is rolling down an inclined plane?

This is just a question that I was thinking over in class the other day, because the most of the coursework done was involved with collisions between two objects. Wouldn't this also be considered the case for this question since as the object is rolling down, it is constantly colliding with the ramp..
 
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The momentum of what? The momentum of a system (not of individual objects) is conserved if and only if the force acting on the system is 0. The force acting on a rolling ball is not 0, so its momentum is not conserved. However, if you consider the system consisting of the ball, the ramp, and the Earth, that system's momentum is conserved.
 
By force acting on the system, you mean the "net force" must equal 0? And yes, I was talking about the second situation that you stated.
 
Yes, I mean net force.
 

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