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
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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?
 
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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.
 

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