Need help for question on Friction

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SUMMARY

The discussion centers on understanding the concept of friction in physics, specifically the frictional force denoted as Ff. The relevant equations provided include Ff = μN and Ff = μkmgcosθ. Participants emphasize the importance of resolving forces along the X and Y axes and applying Newton's second law to determine the frictional force. A visual aid was also shared to assist in comprehending the problem.

PREREQUISITES
  • Understanding of basic physics concepts, particularly forces and motion.
  • Familiarity with the equations of friction, specifically Ff = μN.
  • Knowledge of Newton's laws of motion, especially the second law.
  • Ability to resolve vectors into components along the X and Y axes.
NEXT STEPS
  • Study the concept of friction and its coefficients, including static and kinetic friction.
  • Learn how to apply Newton's second law in various scenarios.
  • Practice resolving forces into components using trigonometric functions (SOH-CAH-TOA).
  • Explore graphical representations of forces to enhance problem-solving skills in physics.
USEFUL FOR

This discussion is beneficial for physics students, educators, and anyone seeking to deepen their understanding of friction and force analysis in mechanics.

Daisy
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Homework Statement



Screen Shot 2014-09-14 at 11.59.20 AM.png


So that is the question.

Homework Equations



The relevant equations I've used are:

Ff=μN

Ff=μkmgcosθ



The Attempt at a Solution



I don't even know what Ff is? I believe this question involves using toa, cah, soh, but i really am confused about how i should go about with it. :( Can somebody please help me?
 
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The problem statement provides a good deal more information than is required to answer the question. Can you identify the minimum data that is needed to answer the question?

If you don't know what Ff is, then you had better refer to your class notes to learn what Ff is.
 
Daisy said:

I don't even know what Ff is? I believe this question involves using toa, cah, soh, but i really am confused about how i should go about with it. :( Can somebody please help me?

Hi Daisy.Welcome to Physics forum.
I have made a figure for you.Please have a look here.
PPP@.png



From this figure resolve mg on X and Y axis then use Newton's second law in Y direction.
And from formula Ff =μR you can find frictional force.
 

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