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Introductory Physics Homework Help
A question about Momentum and kinetic energy.
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[QUOTE="Stephen Tashi, post: 4940808, member: 186655"] Whether a force is "internal" depends on what "system" you are considering. If we think of the two masses and the spring as a single system, the force of the spring on the masses is "internal". If we are thinking of mass m1 as a "system" then the force of the spring is not "internal" to it. [B][/B] If you consider the rock as the "system" then the force of the wall on the rock is not "internal". Momentum of a system is not conserved when net external forces act on it. I'm not sure what you mean by "since it's spring related". If you are asking whether kinetic energy would be conserved if the spring is an ideal type of massless spring that obeys Hooke''s law, I think it would be. We could try to analyze the situation and find out. [/QUOTE]
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Introductory Physics Homework Help
A question about Momentum and kinetic energy.
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