Mechanical Engineering - Engineering Mechanics - Discussion

Please tell anyone clearly about Coefficient of restitution.

Coefficient of restitution for elastic bodies is 0 - 1.

Coefficient of restitution for perfect elastic bodies is 1.

So answer is B.

Guys how can an elastic collision occur unless and until the bodies are elastic.?

For perfectly elastic cor : 1.

For perfectly inelastic cor : 0.

For partially elastic cor: 0 <e<1.

The coefficient of restitution (COR) of two colliding objects is a positive real number between 0.0 and 1.0 representing the ratio of speeds after and before an impact, taken along the line of the impact. Pairs of objects with COR = 1 collide elastically, while objects with COR < 1 collide inelastically. For a COR = 0, the objects effectively "stop" at the collision, not bouncing at all. An object (singular) is often described as having a coefficient of restitution as if it were an intrinsic property without reference to a second object, in this case the definition is assumed to be with respect to collisions with a perfectly rigid and elastic object. The Coefficient of Restitution is equal to the Relative Speed After Collision divided by the Relative Speed Before Collision.

Dropping several objects and measuring how high they bounce to determine the coefficient of restitution for each object.

And because elastic body is zero because perfectly elastic.

What is meant by COR?

COR Means Coefficient of Restitution.

What is mean by restitution?

How to differentiate elastic body and elastic collision?