Rotational doubt (also momentum)

In summary, the conversation discusses the use of the coefficient of restitution in an elastic collision between a ball and a stick. It is questioned whether a COR of one can be used if the collision occurs at a point other than the centre of mass. The definition of an elastic collision is mentioned, stating that the total kinetic energy is conserved. It is also suggested to apply conservation of linear momentum, angular momentum, and kinetic energy instead of focusing on the COR.
  • #1
iitjee10
57
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
  • #2
According to the definition of an elastic collision, the total kinetic energy is conserved.
 
  • #3
so u r telling that we can't use coefficient of restitution as zero in this case??
 
  • #4
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.
 
  • #5
Yeah i meant 1
then what will be COR??
 
  • #6
Why not forget about COR and just apply conservation of linear momentum, angular momentum, and kinetic energy.
 

1. What is rotational doubt?

Rotational doubt, also known as momentum, is a physical property of an object that describes its resistance to changes in rotational motion. It is a vector quantity, meaning it has both magnitude and direction.

2. How is rotational doubt measured?

Rotational doubt is measured in units of kilogram meters squared per second (kg·m²/s) in the International System of Units (SI). In the British system of units, it is measured in pound feet squared per second (lb·ft²/s).

3. What factors affect rotational doubt?

The rotational doubt of an object is affected by its mass, radius, and distribution of mass. Objects with larger mass, larger radius, or more spread out mass distribution tend to have higher rotational doubt.

4. How is rotational doubt different from linear momentum?

Rotational doubt and linear momentum are both physical properties that represent an object's resistance to changes in motion. However, rotational doubt specifically refers to an object's resistance to changes in rotational motion, while linear momentum refers to an object's resistance to changes in linear motion.

5. What is the conservation of rotational doubt?

The conservation of rotational doubt states that in a closed system, the total rotational doubt remains constant. This means that rotational doubt can be transferred between objects, but the total amount of rotational doubt in the system will always remain the same.

Similar threads

  • Mechanics
Replies
9
Views
1K
Replies
14
Views
1K
Replies
3
Views
973
Replies
30
Views
1K
Replies
19
Views
1K
Replies
5
Views
3K
Replies
1
Views
326
Replies
5
Views
844
  • Mechanics
2
Replies
53
Views
2K
Back
Top