Physics (AS & A Level) · May / June 2024 · Paper 13 · Question 9
9702Linear momentum and its conservation
Which statement about a perfectly elastic collision between two objects is correct?
- ATotal kinetic energy is conserved and the relative speed of approach equals the relative speed of separation.
- BTotal kinetic energy is conserved but the relative speed of approach does not equal the relative speed of separation.
- CTotal kinetic energy is not conserved and the relative speed of approach does not equal the relative speed of separation.
- DTotal kinetic energy is not conserved but the relative speed of approach does equal the relative speed of separation.
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Correct answer: A. Total kinetic energy is conserved and the relative speed of approach equals the relative speed of separation.
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