Explaining the Relationship Between Force and Acceleration: Newton's Second Law

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Homework Help Overview

The discussion revolves around the relationship between force and acceleration as described by Newton's Second Law, particularly in a context where there are no external, unbalanced forces. Participants are exploring how this law relates to the Law of Inertia.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are attempting to clarify the distinction between Newton's First and Second Laws, particularly regarding the implications of F=ma and the conditions under which an object's velocity remains unchanged. Questions are raised about the meaning of force when no external push is applied.

Discussion Status

The discussion is ongoing, with participants expressing confusion over the relationship between the laws and seeking to clarify their understanding. Some guidance has been offered regarding the definitions of the laws, but there is no explicit consensus on the explanation being sought.

Contextual Notes

Participants are navigating a misunderstanding regarding the definitions and implications of Newton's laws, particularly in the context of a homework assignment that requires them to connect these concepts.

flyingpig
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flyingpig said:

Homework Statement


In frame of reference where ther are no external, unbalanced forces, show that Newton's Second Law includes the Law of Inertia


Homework Equations



f=ma

The Attempt at a Solution



I thought the Law of Inertia is only in the First law, the second law states that unless you push an object, the velocity of that object would not change.

No, that's the first law. The second law is F=ma.
 
ideasrule said:
No, that's the first law. The second law is F=ma.

I know, read my question...it wants me to explain that.
 
flyingpig said:
I know, read my question...it wants me to explain that.

I don't think we're understanding each other. You said:

"the second law states that unless you push an object, the velocity of that object would not change."

It's the first law that says that, not the second. The second law is F=ma. The question wants you to explain why F=ma implies that unless you push an object, the velocity of that object would not change. To begin, what would "F" be if you don't push an object?
 
ideasrule said:
I don't think we're understanding each other. You said:

"the second law states that unless you push an object, the velocity of that object would not change."

It's the first law that says that, not the second. The second law is F=ma. The question wants you to explain why F=ma implies that unless you push an object, the velocity of that object would not change. To begin, what would "F" be if you don't push an object?

It be stationary, but I don't follow you...
 

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