Rotational doubt (also momentum)

AI Thread Summary
In elastic collisions, the coefficient of restitution (COR) is not necessarily one if the collision causes rotation. When a ball collides with a stick off-center, the conservation of linear momentum, angular momentum, and kinetic energy must be applied instead of relying solely on the COR. The COR can be affected by the rotational motion of the objects involved. Therefore, it is essential to consider all forms of momentum and energy conservation in such scenarios. Understanding these principles is crucial for analyzing collisions accurately.
iitjee10
Messages
56
Reaction score
0
If a ball collides elastically with a stick at a point other than its centre of mass, then can we use coefficient of restitution is one or do we have to use initial kinetic energy = final kinetic energy??

If we can't use "coefficient of restitution is one" then why?
 
Physics news on Phys.org
According to the definition of an elastic collision, the total kinetic energy is conserved.
 
so u r telling that we can't use coefficient of restitution as zero in this case??
 
iitjee10 said:
so u r telling that we can't use coefficient of restitution as zero in this case??
You must mean one instead of zero.
The COF will not be one if either object starts to rotate.
 
Yeah i meant 1
then what will be COR??
 
Why not forget about COR and just apply conservation of linear momentum, angular momentum, and kinetic energy.
 

Thread 'Derivation of Hamilton's Principle: Questions'

I have recently been really interested in the derivation of Hamiltons Principle. On my research I found that with the term ##m \cdot \frac{d}{dt} (\frac{dr}{dt} \cdot \delta r) = 0## (1) one may derivate ##\delta \int (T - V) dt = 0## (2). The derivation itself I understood quiet good, but what I don't understand is where the equation (1) came from, because in my research it was just given and not derived from anywhere. Does anybody know where (1) comes from or why from it the...
View full post »

Similar threads

B The physics of flywheel launchers (like tennis ball shooters)
2
Replies
60
Views
4K
Counter-intuitive 2D collision
Replies
9
Views
2K
B Questions about momentum and force as well as normal force/friction
Replies
35
Views
4K
B Conservation of momentum in a closed system
Replies
3
Views
2K
B Understanding Physics for Coding Collision of 2 Balls
Replies
14
Views
3K
B Conservation of momentum and conservation of energy details
Replies
30
Views
3K
Test question: What is true for a mechanical impact?
Replies
7
Views
1K
I Question about a Rotating system with mass moving inwards
Replies
19
Views
2K
I Question about Momentum vs. Kinetic Energy vs. Deforming In Collisions
Replies
2
Views
2K
B Sympathetic motion generated by cleaning Rubik's cube
Replies
10
Views
496

Hot Threads

Recent Insights

Back
Top