Experimentally Determine Coefficient of Static Friction

Click For Summary

Homework Help Overview

The discussion revolves around determining the coefficient of static friction in a system involving two masses, M1 and M2, where M1 is on a surface and M2 is hanging. Participants are exploring the relationship between tension, friction, and the weights of the masses.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • The original poster attempts to understand how to incorporate horizontal and vertical forces into the calculation of static friction. Some participants question the relationship between tension and friction force, while others clarify the definitions of normal force and weight.

Discussion Status

Participants are actively engaging with the problem, offering hints and clarifications about the relationships between forces. There is a productive exchange regarding the definitions of tension and normal force, though no consensus has been reached on the final calculation.

Contextual Notes

Participants are working under the constraints of determining static friction at the point of impending motion, and there is an emphasis on understanding the forces involved without providing a complete solution.

chrissyinbloom
Messages
5
Reaction score
0
I need to determine the coefficient of static friction for the following set-up.

M1 = 380.45g
M2 = 74.7g

This is what I know... u=F/mg

What I can't figure out is how to factor in the horizontal and vertical weights.

Can anyone help?

Thanks!
 

Attachments

Physics news on Phys.org
I should clarify.. those weights are the weights where the system just begins to move.
 
Hint: What does the tension in the string equal?
 
OK, the tension for both is the same.. and it is equal to... M2g I think ?

I'll keep thinking on this..

Thanks
 
Right. There's a single tension in the string and it equals [itex]M_2g[/itex].

So, what must the friction force equal?
 
OK, here's what I think... the force must equal the tension (M2g), which is equal to uN.

What is N then? The mass of M1??
 
chrissyinbloom said:
OK, here's what I think... the force must equal the tension (M2g), which is equal to uN.
Good!

What is N then? The mass of M1??
Not the mass but the weight of M1.
 
Yes, the weight!

Thanks a bunch for your help!
 

Similar threads

  • · Replies 11 ·
Replies
11
Views
3K
  • · Replies 6 ·
Replies
6
Views
2K
Replies
9
Views
2K
  • · Replies 6 ·
Replies
6
Views
2K
Replies
6
Views
3K
Replies
43
Views
3K
Replies
4
Views
1K
  • · Replies 15 ·
Replies
15
Views
1K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K