Calculating Friction Force: 800N Weight & 15° Angle

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SUMMARY

The discussion focuses on calculating the maximum friction force generated by a runner weighing 800 N who exerts a backward and downward force of 1000 N at a 15° angle from vertical. The coefficient of friction is given as 0.09. Participants clarify that the friction force can be calculated using the formulas F=urSin15 for the horizontal component and F=urCos15 for the vertical component. This approach allows for determining both the maximum and actual friction forces acting between the runner's shoes and the surface.

PREREQUISITES
  • Understanding of basic physics concepts such as forces and friction.
  • Familiarity with trigonometric functions, specifically sine and cosine.
  • Knowledge of the coefficient of friction and its application in force calculations.
  • Ability to interpret and create free-body diagrams to visualize forces.
NEXT STEPS
  • Learn how to apply Newton's laws of motion in practical scenarios.
  • Study the principles of static and kinetic friction in detail.
  • Explore advanced trigonometric applications in physics problems.
  • Investigate the impact of different surface materials on friction coefficients.
USEFUL FOR

This discussion is beneficial for physics students, sports scientists, and anyone interested in biomechanics, particularly those analyzing the forces involved in running and frictional interactions between surfaces.

tweake
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Here's there problem:
You are running, your weight is 800 N. You generate a backward and downward force of 1000 N at an angle of 15 degrees from vertical. What is the maximum friction force you can generate and the actual fritction force generated between the surface area and your shoe. Coefficient of friction=0.09

im not sure how to start this i have been using the F=ur but I am not sure how the angle works into everything. Thank You sooooooo much :cry:
 
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But can you draw the figure and list all the forces applied to You ?
I think I can help you, but first you should draw and post the picture...
 
I think, for Ox, you have F=urSin15
for Oy you have F=urCos15
 

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