Do Internal Forces Affect the Net Force of a System?

[EV33]

Homework Statement

Does net force on a system depend on forces that are internal to that system.

Homework Equations

My problem with understanding this is I don't know any equations that relate net force, external force and/or internal force.

The Attempt at a Solution

My guess is that internal work doesn't have to do with the net work of the system but without an equation I can't know sure. So I am not aking for the answer, I would just like an equaion to analyze because I can't find one.

 

[anathema]

Thank you for your question. I can confirm that the net force on a system does indeed depend on both external and internal forces. This can be explained by the concept of Newton's Third Law, which states that for every action, there is an equal and opposite reaction.

In the context of forces, this means that every external force applied to a system will result in an equal and opposite internal force within the system. These internal forces may cancel each other out, resulting in a net force of zero on the system, or they may add up to produce a net force in a certain direction.

To analyze this further, we can use the equation F = ma, where F is the net force, m is the mass of the system, and a is the acceleration. This equation shows that the net force is directly proportional to the acceleration of the system. Therefore, any changes in the internal forces within the system will affect the net force and consequently, the acceleration of the system.

I hope this helps to clarify your understanding. If you have any further questions, please don't hesitate to ask. Best of luck with your studies.

 

[kerimek]

The net force of a system is the sum of all external forces acting on that system. Internal forces, which are forces between objects within the system, do not contribute to the net force because they cancel each other out. This is known as the principle of action and reaction. Therefore, the net force of a system does not depend on internal forces.

To calculate the net force of a system, you can use the equation Fnet = ΣFext, where Fnet is the net force, ΣFext is the sum of all external forces, and Σ represents the sum of all forces. This equation only considers external forces and does not take into account internal forces.

I hope this helps clarify your understanding of net force and how it relates to internal and external forces in a system.