Solving Physics Homework: A Frustrating Struggle

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SUMMARY

The forum discussion centers on the challenges faced while solving a physics homework problem involving impulse and energy conservation. The user initially attempted to apply impulse-momentum principles and conservation of energy but arrived at an incorrect solution. They later recognized the importance of the equation v = vo + a*t, which provided clarity and a new perspective on the problem. This highlights the necessity of exploring multiple approaches in physics problem-solving.

PREREQUISITES
  • Understanding of impulse and momentum principles
  • Familiarity with conservation of energy concepts
  • Knowledge of kinematic equations, specifically v = vo + a*t
  • Ability to analyze free body diagrams (FBDs)
NEXT STEPS
  • Study the application of impulse-momentum theorem in various scenarios
  • Explore conservation of energy problems in different contexts
  • Practice solving kinematic equations with real-world examples
  • Learn techniques for avoiding tunnel vision in problem-solving
USEFUL FOR

Students studying physics, educators teaching mechanics, and anyone looking to enhance their problem-solving skills in physics-related topics.

stinlin
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Homework Statement


See link.

http://img515.imageshack.us/img515/6383/picture15lj9.jpg


Homework Equations



Imp = integral F dt
mv = momentum
mgh
1/2 mv^2

The Attempt at a Solution



I drew to FBD's to find the impulses and such, but I just don't know what to do. I then tried to use impulse momentum combined with conservation of energy, but got the WRONG answer. I can take a picture of my work, but it'll mean nothing...
 
Last edited by a moderator:
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I was interested in solving this problem, but it turned out to be trickier than I thought it was...maybe I suck? heheanyways, google helped me find this:

https://www.physicsforums.com/archive/index.php/t-72193.html

looks familiar doesn't it?how frustrating...somehow I overlooked the use of v = vo + a*t

so simple when you get another perspective, sometimes you get tunnel vision and want to solve it your own way but there are better ways

anyways blah...rambling
 
Last edited:

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