Is Zero Net Force Required for Momentum Conservation?

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SUMMARY

For momentum conservation in a system, the net force acting on that system must be zero. This principle applies universally, confirming that without external forces, the total momentum remains constant. Additionally, for angular momentum to be conserved, the net torque must also be zero. These foundational concepts are critical in understanding the dynamics of physical systems.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Basic knowledge of momentum and angular momentum
  • Familiarity with the concepts of force and torque
  • Ability to apply conservation laws in physics
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  • Study the implications of Newton's First Law of Motion
  • Learn about the conservation of angular momentum in rotating systems
  • Explore examples of systems with zero net force and their momentum behavior
  • Investigate the relationship between torque and angular momentum conservation
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Students of physics, educators teaching mechanics, and anyone interested in the principles of momentum and force in physical systems.

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Homework Statement


What has to be true in order for the momentum of a system to be conserved?


Homework Equations





The Attempt at a Solution


I am thinking the net force needs to be zero.

Just wanting to confirm this is correct.

Thanks in advance
 
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In order for the total momentum of a system to be conserved, the net force on that system must be zero. In order for the total angular momentum to be conserved, the net torque must be zero.
 

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