What mechanical paramater has a unit corresponding to expression

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Homework Help Overview

The discussion revolves around identifying a mechanical parameter that corresponds to the unit expression N² sec³/kgm. Participants explore the relationship between various physical quantities and their units, particularly focusing on force and its derivation from fundamental SI units.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants discuss the definition of a Newton and its breakdown into SI units, questioning how these relate to the given expression. There is an exploration of whether the answer is force or impulse, with attempts to clarify the implications of unit conversions.

Discussion Status

The discussion has progressed with some participants confirming the relationship between Newtons and force, while others are probing deeper into the implications of the unit expression. There is a recognition of the connection to impulse, indicating a productive line of inquiry.

Contextual Notes

Participants are working within the constraints of a homework problem, seeking to understand the underlying principles without arriving at a definitive conclusion. The original poster expresses a need for assistance, indicating a learning-focused environment.

helpme1
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Homework Statement


What mechanical parameter has a unit corresponding to expression N2 sec3/kgm ?


Homework Equations


a.impulse b.time c.velocity d.energy e.force


The Attempt at a Solution


i need your help. please take a look this.
thanks in advance.
 
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do you know what a Newton is in SI units?
 
Force.
 
helpme1 said:
Force.

no, a Newton is the unit of force but a Newton can be broken down into simpler units of measure. this is the equivalency:

[tex][N]=[\frac{Kgm}{s^2}][/tex] -(these are the units for F=ma)

This should make sense to you, F=ma. "m" is measured in Kg, "a" is measured in m/s^2. when you multiply the two you get a unit of Newton
 
srmeier said:
no, a Newton is the unit of force but a Newton can be broken down into simpler units of measure. this is the equivalency:

[tex][N]=[\frac{Kgm}{s^2}][/tex] -(these are the units for F=ma)

This should make sense to you, F=ma. "m" is measured in Kg, "a" is measured in m/s^2. when you multiply the two you get a unit of Newton

thanks for your response. but then the answer of question is Force ? right.
 
no, plug the SI expression for a Newton into the original expression, what units are left?
 
impulse ?
 
you got it! ^^
 
ah thanks! :) you are helpful. i did it by thinking. at last i did a physics test my own (of course with your help)
 

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