Question

Assertion : $KE$ is conserved at every instant of elastic collision.
Reason : No deformation of matter occurs in elastic collision.

• A. If both assertion and reason are true and reason is the correct explanation of assertion.
• B. If both assertion and reason are true but reason is not the correct explanation of assertion.
• C. If assertion is true but reason is false.
• D. If both assertion and reason are false.

Answer 1

Answer: (D)

Kinetic energy is not conserved at every instant of elastic collision because there will be friction and deformation losses of energy.