Questions tagged [collision]
This tag is for questions relating to collision which is the interaction between two or more bodies that results in physical contact and an exchange of momentum between the bodies involved. When it happens, kinetic energy is often exchanged between the molecules’ translational motion and their internal degrees of freedom.
2,031 questions
9
votes
4
answers
1k
views
When I bang two metal spheres together to demonstrate kinetic energy by burning paper, why don't the rest of the spheres get hot?
I got a pair of 1-pound chrome spheres that I was planning to use for a presentation where you hold one in each hand and bang them together with a piece of paper between them, and then smell the paper ...
- 273
0
votes
2
answers
45
views
I have a problem determining the angle of deflection between two disks
Two identical pucks slide on an ice hockey rink as shown in the
figure. If puck A has an initial speed of 5 m/s to the right and puck
B is at rest, the coefficient of restitution between them is 𝑒
= ...
4
votes
2
answers
297
views
Angular momentum conservation for a rolling ball after an initial impulse
First a ball gets an impulse $J$. Why can we say that $$Jh = I_cm w,$$ when it is clear that the friction force is also acting around the CM of the ball. When balacing forces around the CM we see that ...
- 41
0
votes
1
answer
66
views
Velocity of approach equal to velocity of separation?
Can we say that the velocity of approach is equal to the velocity of separation here?
I saw this being used in a problem. From what I understand, this result was derived for two particles undergoing ...
0
votes
3
answers
88
views
Doubt in conservation of momentum in perfectly inelastic collision in different frames [closed]
If body A1 is at rest and another body B1 is approaching towards it and they have perfectly inelastic collision collision . So how in frame of body A1 that was at rest say that momentum is conserve ...
0
votes
1
answer
88
views
Non-Newtonian Fluid Density
When a projectile hits a non-Newtonian fluid, does the density of the fluid at the spot of impact increase?
- 39
2
votes
0
answers
77
views
Derivation of the density of states for a two-body collision (bosonic particles)
I am studying the problem consisting in the collision of two bosonic particless with initial momentum $k_1$ and $k_2$. The initial quantum state is so defined as $|k_1,k_2>$. After the collision ...
- 63
1
vote
0
answers
88
views
Cricket ball trajectory calculation [closed]
I want to calculate the trajectory of a cricket ball using the TV camera, and be able to model the ball after it pitches. However, I am finding it difficult to accurately get the values of bounce ...
- 11
3
votes
5
answers
1k
views
Impulse applied to the wall with my hand but why isn't there a change in the momentum of the wall?
If I am pushing my hand against the wall for a long time am I applying an impulse? While pushing against the wall I am preventing my center-of-mass being moved by also pushing my feet against the ...
- 535
0
votes
0
answers
85
views
General formula of glancing collision to classical scattering theory?
I encountered this . It takes some time for me to find that it is called glancing collision, well my language doesn’t has. What i interest isn’t the solution of the picture, but generalized ...
user222803
0
votes
4
answers
269
views
Could a mechanical experiment (with massive projectiles) serve as an analogue to Michelson–Morley in testing Lorentz symmetry?
The Michelson–Morley experiment (and its successors like Kennedy–Thorndike and Ives–Stilwell) tested Lorentz symmetry by looking for anisotropies in the propagation of light.
This experiment proposes ...
- 19
-1
votes
1
answer
136
views
Bouncing a marble on another marble against a wall, one marble bounces over 10 times further than the other, why?
To illustrate this I have made a video please watch to see what I am talking about.
The link to video: https://1drv.ms/v/c/239f920f6f9d68cd/EdEiB5OE-jhLvPh5STh8MIMBwvQBuzYpJ24sgfgLP8piWA?e=Mbz3z6
My ...
-1
votes
3
answers
177
views
Doubt regarding a scenario for energy conservation
Consider the scenario below
Make assumptions such as:
1.No energy is dissipated as heat or sound during collision
2.We consider the only energy possessed by the bodies to be kinetic energy of motion.
...
0
votes
1
answer
112
views
The role of constant deceleration in a collision [closed]
I am working on some momentum problems from introductory mechanics resources I found online. The context is the following paragraph. The full problem set is #3 in this link.
The compressive force per ...
- 3
0
votes
0
answers
109
views
Usage of total cross sections in different reference frames relavistically
I am currently working on calculating the mean free path length of mild relativistic positrons in thermalized plasmas. For example, I want to calculate the mean free path length considering Rutherford ...
