How Is Friction Force Calculated in Physics Problems?

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Homework Help Overview

The discussion revolves around calculating the force of friction acting on a box with a given mass and angles, involving dynamic and static coefficients of friction. The context includes forces acting on the box, with specific angles and a force value provided.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the calculation of friction force using the formula involving the normal force and coefficients of friction. Questions arise regarding the angles T1 and T2, the nature of the force F, and the overall setup of the problem.

Discussion Status

Some participants are attempting calculations based on the provided values, while others are seeking clarification on the problem's complete statement and the meanings of the angles involved. There is an emphasis on the need for additional information, such as a sketch of the setup, to facilitate understanding.

Contextual Notes

Participants note the importance of understanding the angles and the configuration of forces acting on the box, suggesting that the problem may involve more complexity than initially presented. The lack of a complete problem statement and visual aids is highlighted as a barrier to providing effective assistance.

hkin2019

Homework Statement


Box Mass = 64.7 kg T1 = 22.5° T2 = 54.1° F = 2327.9 N

μdynamic = 0.19 μstatic = 0.37

What is the force of friction acting on the box?

Homework Equations


FF= mu x FN

The Attempt at a Solution


64.7 x 9.81 = 634.707
0.19 x 634.707 = 120.69

Computer is telling me that it is incorrect
 
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You should work with units (maybe that’s the problem already?). For the dynamic friction I get 120.5[/color]9 N - assuming the box is on a horizontal surface. There are other things given, it looks like the problem is more than that single question.
 
What kind of angles are T1 and T2? What is F? What is the complete statement of the problem?
 
T1= 22.5
T2=54.1
F=2327.9N

The statement is finding the force of friction on a box on a slope in the horizontal direction
 
What are T1 and T2? Not their values, but what is their meaning?

Is there a sketch of the setup?
 
mfb said:
What are T1 and T2? Not their values, but what is their meaning?

Is there a sketch of the setup?
 
T1 & T2 are angles T1 is the angle of the slope at the bottom
and T2 is the angle off of the box where F is coming off of
 
Which slope?
We don't have a crystal ball. If you don't show the full problem statement, it is impossible to help.

I guess the problem came with a sketch. Please share this sketch.
 

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