Help with calculating Speed using distance and time

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SUMMARY

The discussion centers on calculating speed during a collision, specifically emphasizing the use of the conservation of momentum formula. Participants clarify that kinetic energy formulas are not appropriate for this calculation. The consensus is that applying the conservation of momentum will yield accurate results for determining speed in collision scenarios.

PREREQUISITES
  • Understanding of basic physics concepts, particularly momentum and kinetic energy.
  • Familiarity with the conservation of momentum principle.
  • Basic algebra skills for manipulating formulas.
  • Knowledge of collision types (elastic vs. inelastic).
NEXT STEPS
  • Study the conservation of momentum in detail, focusing on its application in collisions.
  • Learn how to differentiate between elastic and inelastic collisions.
  • Explore examples of momentum calculations in real-world scenarios.
  • Investigate the relationship between kinetic energy and momentum in collisions.
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Students studying physics, educators teaching mechanics, and anyone involved in fields requiring collision analysis, such as automotive engineering or safety testing.

Daisy
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Calculating speed of collision

Here is the question

Screen Shot 2014-09-13 at 5.57.55 PM.png



So my question is, which formula do I use? I am just really confused. Do I use a kinetic energy one? or?
 
Last edited:
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You should use conservation of momentum.
 

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