Collision (elastic)
In a perfectly elastic collision between two isolated bodies, which quantities are conserved?
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About This Question
- Subject
- physics
- Chapter
- work, energy and power
- Topic
- collision (elastic)
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Momentum and kinetic energy
- Linear Momentum: Conserved in all collisions (elastic or inelastic) provided there are no external net forces on the system.
- Kinetic Energy: Conserved only in perfectly elastic collisions. In other cases, some KE is converted to heat, sound, or internal deformation energy. Therefore, both are conserved in an elastic collision.
This easy difficulty physics question is from the chapter work, energy and power, covering the topic of collision (elastic). It appeared in the 2025 exam.
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