The coefficient of restitution

In summary, the conversation revolved around the coefficient of restitution (COR) and its relationship to external forces and materials. The topic was introduced as something learned in school and the speaker expressed interest in whether COR differs with or without external forces. The conversation also mentioned the availability of reference papers on the topic. A few links were shared, discussing the COF's relation to impulse forces and the argument that COR remains constant between materials.
  • #1
Lucien1011
24
0
Hello everyone
I learned the coefficient of restitution in school.
I wonder if the coefficients of restitution of two bodies are different in the cases with and without external force acting on the two bodies.
Also, do you guys have any reference paper about COR?
Thank you so much!
 
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  • #3
The COF is related to implsive forces between two objects and external forces have no influence.
 
  • #4
As clem was saying the coefficient of restitution will be the same since it's a static value between two materials.
 

What is the coefficient of restitution?

The coefficient of restitution, also known as COR, is a measure of the elasticity of a collision between two objects. It is defined as the ratio of the relative velocity of separation to the relative velocity of approach.

How is the coefficient of restitution calculated?

The coefficient of restitution is calculated by dividing the relative velocity of separation by the relative velocity of approach. This can be measured using sensors or calculated using equations based on the masses, velocities, and elasticity of the objects involved in the collision.

What factors affect the coefficient of restitution?

The coefficient of restitution is affected by the elasticity of the objects involved in the collision, as well as the surface materials and conditions, such as temperature and roughness. The shape and angle of impact can also affect the coefficient of restitution.

What is a high coefficient of restitution?

A high coefficient of restitution indicates a highly elastic collision, where the objects involved bounce off each other with minimal loss of kinetic energy. A value of 1 indicates a perfectly elastic collision, while a value of 0 indicates a completely inelastic collision where the objects stick together.

Why is the coefficient of restitution important?

The coefficient of restitution is important in many fields, including sports, engineering, and physics. It helps determine the behavior of objects during collisions, which is essential in designing structures, predicting outcomes of sports events, and understanding the laws of motion.

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