The Secrets of Simple Physics: 2 Problem Solutions Explained

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SUMMARY

This discussion addresses two fundamental physics problems related to human movement and force application. The first problem highlights the necessity of bending the legs while running to generate upward force, facilitating effective horizontal propulsion. The second problem explores the strategy for tearing paper with one hand, emphasizing the need to understand the underlying physics principles, such as force application and material properties. Participants suggest practical experimentation to bridge intuitive understanding with physics concepts.

PREREQUISITES
  • Basic understanding of Newton's laws of motion
  • Familiarity with concepts of force and propulsion
  • Knowledge of material properties related to tearing
  • Experience with practical physics experimentation
NEXT STEPS
  • Research Newton's laws of motion and their application in human movement
  • Explore the physics of force application in sports and athletics
  • Investigate material science principles related to tearing and stress
  • Conduct experiments on human biomechanics during running
USEFUL FOR

Students of physics, athletes, coaches, and anyone interested in the practical applications of physics in everyday activities and sports performance.

lusterjester
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I have 2 problems.
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.




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Im believing the first question is about your body needing an upward force in order to move correctly and the second one I am completely lost - _ -
 
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1) If you kept your legs straight, would it be easy to propel yourself in the horizontal direction?

2) I suggest trying to tear paper with one hand and list what you think works, that way someone can explain/help you with translating what you intuitively know into physics language. Might just be me, but I'm finding it difficult to help with this question without just giving you the answer.
 

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