During an inelastic collision between two bodies, which of the following quantities always remain conserved?
| 1. | total kinetic energy |
| 2. | total mechanical energy |
| 3. | total linear momentum |
| 4. | speed of each body |
Hint: Apply the concept of conservation of momentum.
Explanation: When we are considering the two bodies as a system the total external force on the system will be zero. Hence, the total linear momentum of the system remains conserved. If in a collision kinetic energy after collision is not equal to kinetic energy before collision the collision is said to be inelastic.
Hence, option (3) is the correct answer.
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