Q28 of 48 Page 45

In an elastic collision of two billiard balls, which of the following quantities remain conserved during the short time of collision of the balls (i.e., when they are in contact).

(a) Kinetic energy.


(b) Total linear momentum? Give reason for your answer in each case.


During the collision the there might occur deformation in the billiard balls due to which some of the kinetic energy may get lost in the potential energy. While linear momentum is always conserved so only linear momentum will be conserved at the time of collision.


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