AIIMS 2018 Physics Elastic and Inelastic Collisions Assertion Reason Question
Assertion: In an elastic collision of two billiard balls, the total kinetic energy is conserved during the short time of collision of the balls i.e., when they are in contact. Reason: Energy spent against friction follow the law of conservation of energy.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
In an elastic collision, such as that between two billiard balls, both momentum and kinetic energy are conserved during the brief contact period, validating the assertion. The reason provided correctly states that energy spent against friction adheres to the law of conservation of energy, as it implies that energy transformations occur without loss, thus supporting the assertion. Other options are incorrect because they either misinterpret the relationship between the assertion and reason or incorrectly classify one or both as false, which is not the case here.
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