Solving Momentum and Kinetic Energy Relations

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Homework Help Overview

The discussion revolves around the application of momentum and kinetic energy conservation principles in a physics problem involving two objects with given masses and velocities. The original poster expresses difficulty in solving the relations due to the presence of two unknowns.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to apply conservation laws but struggles with the correct application, particularly in using substitution methods. Other participants question the clarity of the original poster's approach and seek further engagement.

Discussion Status

The discussion appears to be in an early stage, with the original poster seeking assistance and clarification. There is a lack of responses providing guidance or alternative approaches, indicating that the conversation is still open and exploratory.

Contextual Notes

The original poster mentions repeated difficulties with similar problems, suggesting a potential gap in understanding the underlying concepts or methods. There is also a request for external resources, indicating a search for additional support.

Garen
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Homework Statement


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Homework Equations


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[PLAIN]http://upload.wikimedia.org/math/7/7/4/7745116605c54295c6c3b696cea2d39f.png[/CENTER][/URL]

The Attempt at a Solution


I have gotten these problems wrong too many times. I know that I have to apply both the conservations of momentum and kinetic energy, but for some reason I can't come up with the right answer.

m1=21.3g v1=24.6cm/s
m2=11.6g v2=11.3cm/s

I don't know how to solve these relations with two unknowns. I've tried using substitution from the kinetic energy equation, but I still got it wrong for some reason. Any help for a desperate physics student?​
 
Last edited by a moderator:
Physics news on Phys.org
Anyone know where I'm going wrong?
 
Last edited:
No one? Really?
 
Maybe someone can refer me to another website to answer these questions?
 

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