Questions tagged [contact-mechanics]
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Elevator force diagram
Am i correct when i say that all the seperate bodies and the whole system has to have 10m/s² acceleration?
So can i say : F=ma
For elevator : (T-R) = 10 × mass of elevator
For box : (R - 20N) = 10 × 2
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Do contact forces form a field/wave?
Non-contact forces like gravitational forces exist between two objects in any medium because of the establishment of a field/wave.
Since at an atomic level, 'physical' contact won't really be possible ...
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Are contact forces exerted due to gravity
For example, a book rests upon a table, on earth the weight of the object is balanced by the normal reaction force exerted by the table on the book but in reality, the normal contact isn't the ...
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Direction of undetermined contact force & undetermined Normal force [closed]
I am not getting the following sattements related to contact force and normal force which are:
If the direction of contact force cannot be determined, it should be shown as two components.
If ...
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How do I analyze the cue tip at impact with a billiard ball?
this is not a homework problem, it is something I've been trying to understand in billiard physics (because I'm a big pool fan)
When we hit the cue ball off-center to impart spin, we still don't know ...
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Friction force on a cuboidal block for different orientations - how does $\mu$ change with orientation? [duplicate]
It's been a long time since I did problems on friction but here's one...
Consider a cuboidal block of dimensions 123 meters with a total mass of 1 kg.
There are 3 cases that we need to look at:
Its ...
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If there is no gravitational force on the earth (i.e. acceleration due to gravity is 0m/s^2), will bodies in contact still experience a normal force?
My question arises from this post by Ashish Arora, where he asks: "If $g$ becomes zero suddenly, a body at rest on a fixed table will start moving away from it."
In the above question $g$ is ...
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Using Hertzian contact mechanics to explain fracture cones when an elastic sphere is pressed onto an elastic half space
I'm trying to understand the Hertzian cone fracture process from a continuum mechanics point of view. I'm considering a problem where an elastic sphere is pressed quasi-statically onto an elastic semi-...
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Why do we always assume in problems that if things are initially in contact with each other then they would be like that always?
I am a high school student and I am confused in one thing:"Why do we always assume in problems that if things are initially in contact with each other then they would be like that always?"
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How to obtain the equivalent Young Modulus in Hertzian contact?
I would like to understand why there's a $\nu²$ in the expression of the equivalent Young modulus in the Hertzian contact theory.
Here's a common expression for an elastic sphere crushed on a rigid ...
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Controversial model of microscopic springs to explain both static friction force and normal force
Many authors (like Randall D. Knight and Eric Mazur) explain nature of static friction force (either static or kinetic) in terms of molecular bonds, which are developed on microscopic bump of ...
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When solving problems on linear momentum, when can external forces be neglected?
I was recently solving a problem in which one end of a massless string (in vertical orientation) was tied to a block of mass $2m$ and the other end to a ring of mass $m$, which was free to move along ...
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Any material for learning Computational Contact Mechanics?
I am currently studying computational contact mechanics for my research. Does anyone know some good material (especially introductory material) for this subject? I have already read the following two ...
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What is the difference between normal and contact forces?
What is the difference between normal and contact forces? Isn't the contact force exactly equal to the normal force? I don't see how some contact forces aren't perpendicular to the object they are ...
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Understanding the interactions resulting from the effect of a force on an object that is in contact with another object
I've tried to think on how a force acting on a single object that is in contact with another makes the system of the two accelerate and wanted to know if I'm thinking correct.
Consider the situation:
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