Solving for coefficient of friction

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Homework Help Overview

The discussion revolves around calculating the coefficient of friction in a scenario involving a worker pulling a cart at an angle. The problem involves understanding the forces acting on the cart and how they relate to friction.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • The original poster attempts to use a formula involving friction and gravitational forces but expresses uncertainty about their calculations. Other participants request clarification on the working and reasoning behind the calculations, particularly regarding the summation of forces and the use of a free-body diagram.

Discussion Status

The discussion is ongoing, with participants seeking clarification and further details on the original poster's calculations. There is a focus on ensuring that the forces are summed correctly, and guidance is being offered to help the original poster articulate their reasoning.

Contextual Notes

Participants note the need for a free-body diagram and question the assumptions made in the calculations, indicating that there may be missing information or misunderstandings regarding the setup of the problem.

tep
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1. a worker can supply a maximum pull of 150 lb on a cart w/c has a handle set at an angle of 40° above the horizontal. what is the coefficient of friction if he can just move a total load of 1500 lb ?



2. μ = Ff/mg



3. so i solved it by 150sin(40) divide by 1500cos(40), but I'm not sure if it is correct... please help :)
 
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Please show your working and reasoning.
 
my answer is 0.083 but I'm not sure if its correct.
 
That's answer ... please show your working and your reasoning.
Without this information I cannot help you properly.
I don't think you've summed the forces properly but I don't know.

i.e.: you did: 1500cos(40) - how did you decide to do that? What does that figure represent?
Did you draw a free-body diagram? What?
 

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