All Questions
Tagged with material-science newtonian-mechanics
87
questions
6
votes
1
answer
132
views
Is there a way to theoretically estimate the restitution coefficient of a rubber ball?
Let's consider a rubber ball like the ones shown in the picture:
When dropped onto the floor, the ball will rebound, but it won't regain its initial height.
The restitution coefficient is defined as ...
- 1,599
0
votes
1
answer
45
views
Material strength against kinetic energy instead of force [closed]
Knowing the strength of concrete you can get the mass of an object put on a concrete block is able to withstand on given area. As for a falling object, kinetic energy itself doesn't translate to force,...
- 1
0
votes
1
answer
61
views
How would I understand Hysteresis from scratch? [closed]
I wanted to learn about Hysteresis and I know the basic undergraduate level of 'Mechanical properties of matter".
Can anyone please help?
5
votes
2
answers
489
views
Rope strength necessary to stop a fall
Just a random thought experiment, that got me confused.
So when you buy a rope you get info about Tensile Strength(lbs) or kg let's say 1000kg.
That means it can hold an object of that mass.
But the ...
- 51
0
votes
0
answers
58
views
What are the exact conditions for 1D elastic collisions? Is there a list for characterizing when elastic collisions occur?
We know there are elastic, inelastic, and partially elastic collisions. In a fully elastic collision, both momentum and kinetic energy are fully conserved. However, that tells us nothing for which ...
- 8,640
5
votes
3
answers
1k
views
Where would a string break if an instantaneous UNEQUAL tensile force is applied on the ends?
Similar to a question asked previously except this time with unequal tensile forces at the ends: Where would a string being pulled from both sides snap and why?
Assume the string is homogenous.
Would ...
0
votes
0
answers
27
views
Rotational energy in wheel and friction. Estimatiion of rubber loss
When an aeroplane wheel touches ground it goes from 0 rpm to say 800 rpm almost in an instant. Rotational inertia causes the wheel to glide on the asphalt and rubber is chipped off. How can I do an at ...
2
votes
2
answers
76
views
Shape of fastest spinning rod
A one-meter steel rod of variable thickness is attached at one end to a spinning hub. The cross-sectional area of the rod is a function $f(x)$ of the distance $x$ in meters from the hub, x ranging ...
- 912
1
vote
1
answer
31
views
Which material properties determine whether it is best cut with a serrated edge?
Among foods, it is beneficial to use a serrated knife to cut bread and cooked meat, while a serrated edge has less benefit for other items. And then serrated saws are also helpful for cutting wood (...
- 165
0
votes
0
answers
46
views
How tall can a building be on Earth? [duplicate]
This is maths IA problem
Here I have no idea how to solve this problem so any kind of help or suggestions invited
how tall can a building be on earth?
0
votes
2
answers
140
views
The *compressive* strength of spider silk
There's plenty of information about the tensile strength, density, energy density, ductility, etc. of spider silk.
However, I personally cannot find any figures in regards to the compressive strength ...
- 11
1
vote
1
answer
88
views
What is the largest hollow structure that could be made before gravity becomes a problem?
Assume realistic strength of materials, like that of steel or stone, or even something with "good" properties like carbon fiber, or advanced ceramics. If one was to put together a hollow ...
- 3,293
1
vote
2
answers
309
views
Would more windings or bigger diameter makes a spring stronger? [closed]
Imagine I have 2 springs of the same length and material, thickness of wire is the same too. Spring A has twice as much windings and spring B has bigger windings about double the diameter of A. I am ...
- 13k
1
vote
3
answers
95
views
How long does a large impulse take to travel through a solid?
If I had a 1000km long steel rod and I pushed one end of it, when would someone standing at the other end observe movement? Would it travel exactly the speed of sound in that material, or is the speed ...
- 111
4
votes
3
answers
317
views
Why does restoring force of a spring increase as the displacement of one terminal increases?
According to the perspective of a high school student,this question has been asked so pardon me for any lack of intuition or knowledge about this topic.
As far as I know as per Coulomb's law or Newton'...
- 598