Question

Attempt Any Two. 20 Define coefficient of restitution and obtain its value for an elastic collision and perfectly inelastiereollision A force F = 3 + 1 - 4k is applied at a point (3​

Answer 1

The Coefficient of Restitution is a measure of the "bounciness" of a collision between two objects: how much of the kinetic energy remains for the objects to rebound from one another vs. how much is lost as heat, or work done deforming the objects.

The coefficient, e is defined as the ratio of relative speeds after and before an impact, taken along the line of the impact:

e=

Speed of approach

Speed of separation

The bodies stick together in perfectly inelastic collision and move together hence velocity of separation is zero.

(i) For perfectly elastic collision e=1

(ii) For perfectly inelastic collision e=0

(iii) For other collision 0<e<1

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