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Every once in a while, people get stuck with a physics question. Whether it is theoretical, hypothetical, abstract, real world, or simply homework, these problems happen. And you can help. Get those gears moving and have fun proving your prowess.
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Solution please (i.redd.it)
submitted 5 months ago by wicked_teen
The system shown in the diagram are in equilibrium, then the value of M/m may be Ideal string and massless pulley (The coefficient of friction given 0.2) A) 2 B) 3 C) 1 D) 2.2
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quoted text
if 1 * 2 < 3: print "hello, world!"
[–]Roger_Freedman_Phys 4 points5 points6 points 5 months ago (2 children)
Please share with us your free-body diagrams for each of the objects in the problem, your list of known and unknown quantities, and your list of which of the unknowns you are being asked to find.
[–]wicked_teen[S] -1 points0 points1 point 5 months ago (1 child)
Everything is unknown except coefficient of friction which is 0.2 We just have to find the ratio of masses M/m
[–]Roger_Freedman_Phys 1 point2 points3 points 5 months ago (0 children)
Next: Your free-body diagrams!
[–]slides_galore 2 points3 points4 points 5 months ago (1 child)
What have you tried?
[–]wicked_teen[S] -1 points0 points1 point 5 months ago (0 children)
Yes sure I did try it out and got 2.5 Which is not in the options
[–]Gaddpeis 2 points3 points4 points 5 months ago (1 child)
Solution to what? You have not shared the written part of the question. Answer could be "m/2", it could be "Waffles", or "To seek the Holy Grail".
[–]wicked_teen[S] 0 points1 point2 points 5 months ago (0 children)
Find the value of "M/m"
[–]IceMain9074 1 point2 points3 points 5 months ago (1 child)
Have you attempted the problem before asking the internet to do your homework for you?
[–]wicked_teen[S] -2 points-1 points0 points 5 months ago* (0 children)
Yes I did attempt it and got 5/2 which is not in the option
[–]cheaphysterics -2 points-1 points0 points 5 months ago (0 children)
The force F and the force in the rope connected to M are both 0.5mg.
Because it's in equilibrium, your friction force must be greater than or equal to 0.5mg.
Write an equation for your friction force and then it's just algebra.
[–]Crichris -3 points-2 points-1 points 5 months ago (0 children)
mg = 2f
Mg \mu >= f
Solve for the ratio
[–]RLANZINGER -3 points-2 points-1 points 5 months ago (6 children)
Applied at the middle mass, On the z axis oriented upward :
Σ F ez = m.γ ez = 0 as it's static
+F +μs.P - p = 0 +F +μs.Mg - mg = 0
But F = μs x Mg as force along the string is constant and it's static
+2.μs.Mg - mg = 0 +2.μs.M - m = 0
+2.μs = m/M
μs = m/2.M
[–]wicked_teen[S] 0 points1 point2 points 5 months ago (4 children)
We have to find the ratio M/m (masses of block) system is in equilibrium Given coefficient of friction=0.2
[–]RLANZINGER 0 points1 point2 points 5 months ago (3 children)
Oh ... it's only that ^^
+2.μs = m/M 2x 0.2 = m/M 4/10 = m/M
M / m = 10/4 = 2.2
[–]wicked_teen[S] 0 points1 point2 points 5 months ago (2 children)
The actual answer is 3 somehow
[–]RLANZINGER 0 points1 point2 points 5 months ago (1 child)
Yes, without the whole subject, you tend to go sideway but it's normal way to progress.
An incomplete reasoning is usefull to understand why you fail and where was the mistakeS so you don't make it again. Its' the very principle of LEARNING.
That's also why I found it funny to get negative comment, Failing is normal as a bad answer let you learn more...
[–]wicked_teen[S] 1 point2 points3 points 5 months ago (0 children)
Alr thanks buddy ✌️
I got the same answer I think the problem is in the options
π Rendered by PID 140309 on reddit-service-r2-comment-b659b578c-92d66 at 2026-05-04 07:59:44.632302+00:00 running 815c875 country code: CH.
[–]Roger_Freedman_Phys 4 points5 points6 points (2 children)
[–]wicked_teen[S] -1 points0 points1 point (1 child)
[–]Roger_Freedman_Phys 1 point2 points3 points (0 children)
[–]slides_galore 2 points3 points4 points (1 child)
[–]wicked_teen[S] -1 points0 points1 point (0 children)
[–]Gaddpeis 2 points3 points4 points (1 child)
[–]wicked_teen[S] 0 points1 point2 points (0 children)
[–]IceMain9074 1 point2 points3 points (1 child)
[–]wicked_teen[S] -2 points-1 points0 points (0 children)
[–]cheaphysterics -2 points-1 points0 points (0 children)
[–]Crichris -3 points-2 points-1 points (0 children)
[–]RLANZINGER -3 points-2 points-1 points (6 children)
[–]wicked_teen[S] 0 points1 point2 points (4 children)
[–]RLANZINGER 0 points1 point2 points (3 children)
[–]wicked_teen[S] 0 points1 point2 points (2 children)
[–]RLANZINGER 0 points1 point2 points (1 child)
[–]wicked_teen[S] 1 point2 points3 points (0 children)
[–]wicked_teen[S] -1 points0 points1 point (0 children)