Physics Newbie Needs Help with Basic Problems

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SUMMARY

This discussion addresses two fundamental physics questions posed by a beginner. The first question explores the biomechanics of running, specifically why runners bend their legs instead of keeping them straight, which relates to energy efficiency and muscle engagement. The second question examines the physics principles involved in tearing paper with one hand, emphasizing the importance of force application and the potential limitations based on the material properties of the paper. The discussion highlights the relevance of basic physics concepts in everyday activities.

PREREQUISITES
  • Basic understanding of biomechanics in running
  • Familiarity with force and motion principles
  • Knowledge of material properties, specifically tensile strength
  • Concept of ambiguous triangles in physics
NEXT STEPS
  • Research biomechanics of running and leg movement
  • Study Newton's laws of motion and their application in sports
  • Learn about material science, focusing on tensile strength and elasticity
  • Explore the concept of ambiguous triangles in physics and their implications
USEFUL FOR

Physics students, athletes, coaches, and anyone interested in understanding the physical principles behind movement and material interaction.

lusterjester
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I'm a physics Newbie, don't going to deny that. =).

I have two problems that have been giving me headaches and I was wondering if anyone can solve them for me?

1) When you run you do not keep your legs striaght, but rather bend them. What is the reason?

2) Assume you are an athelte, and you believe you can tear paper with just one hand? what is the best stragety? list the components of your strategy stated in terms of physics princples. Will there, in theory at least, ever be a set of circumstances in which will not allow you to use one hand without winding up with paper all over the floor? explain.

thanks to anyone that can help!
 
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im not that advanced in physics also but

1) do you know anything about ambiguous triangles? i think this situation is similar.
 

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