How do you determine conservation of momentum

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Discussion Overview

The discussion revolves around the determination of conservation of momentum in a laboratory experiment. Participants explore how to assess momentum changes and the role of measurement errors in proving conservation principles, focusing on both theoretical and experimental aspects.

Discussion Character

  • Experimental/applied
  • Debate/contested

Main Points Raised

  • One participant presents a specific change in momentum and associated error, questioning if the change must be lower than the error to demonstrate conservation of momentum.
  • Another participant suggests that the initial and final momentum errors must also be considered when evaluating conservation of momentum.
  • A request is made for more details about the experiment and the units used for measurements to better understand the context.
  • A later reply humorously suggests that the participant has disproved classical physics based on their measurements, indicating a playful tone in the discussion.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the criteria for proving conservation of momentum, and multiple viewpoints regarding the role of measurement errors and the interpretation of results remain evident.

Contextual Notes

There are unresolved aspects regarding the definitions of momentum and error, as well as the specific experimental setup that may influence the conclusions drawn by participants.

NewDaddyJones
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In my lab, I have the change in momentum = -8.00 x 10-3 and my error of change in momentum = 1.22 x 10-3.

Does my change in momentum have to be lower than my error of conservation in order to prove conservation of momentum? Then none of my procedures prove this, even though my average error of time is 3.95 x 10-3.
 
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-4.00 x 10-3
 
That was wrong because you have to account for the errors of initial momentum and final momentum. I'm just asking how do you prove conservation of momentum, anyway, not any specific values.
 
Could you perhaps elaborate on your experiment, as well as giving us some units to your measurements.
 
Welcome to PF!

Hi NewDaddyJones! Welcome to PF! :smile:

(try using the X2 icon just above the Reply box :wink:)
NewDaddyJones said:
In my lab, I have the change in momentum = -8.00 x 10-3 and my error of change in momentum = 1.22 x 10-3.

Does my change in momentum have to be lower than my error of conservation in order to prove conservation of momentum? Then none of my procedures prove this, even though my average error of time is 3.95 x 10-3.

if your measurement is 8.00 10-3, and your error is 1.22 10-3, then that's 8.00 ± 1.22 10-3, which isn't zero!

Congratulations! :approve:

You have successfully disproved most of classical physics! :wink:
 

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