Question

CGS and SI UNIT OF coefficient of restitution ​

Answer 1

Coefficient of viscosity has the SI unit Kg m^-1 s^-1

Cgs unit is g cm^-1 s^-1

So the ratio of the two is equal to

\frac{1}{10}  

Hope this helps!!

Answer 2

coefficient of restitution ​has no unit, it is a dimensionless ratio.

Explanation:

Coefficient of restitution ​(COR) is the ratio of the relative velocity of an object after collision to the relative velocity of the object before collision.

COR generally lies between 0 to 1 for most of the conditions.

Some cases for the values of COR:

• COR = 0: Means it is a perfectly inelastic collision and the whole kinetic energy is converted to heat or work done to deform the objects.
• 0 < COR < 1: This is a real-world inelastic collision, in which some kinetic energy is dissipated while the remaining part is reflected into the motion.

• COR < 0: A collision in which the separation velocity of the objects has the same direction (sign) as the initial velocity, indicating that the objects have passed through one another without fully engaging. For example a small, denser object passing through a large, less denser one – e.g., a bullet passing through a target, or a motorcycle passing through a motor home or a wave tearing through a dam.
• COR > 1: This would represent a collision in which energy is released due to the property of material, for instance, nitrocellulose billiard balls can actually explode at the point of impact.

TOPIC: types of collision, Coefficient of restitution

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