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Q: In a collision, always saving of . . . . .
  • A. pressure
  • B. force
  • C. momentum
  • D. thrust
Correct Answer: Option C - In a collision, always saving of momentum. According to the principle of momentum conservation, if no external force is applied on any particles, then the total momentum of this body remains constant i . e the momentum before and after collision is equal.
C. In a collision, always saving of momentum. According to the principle of momentum conservation, if no external force is applied on any particles, then the total momentum of this body remains constant i . e the momentum before and after collision is equal.

Explanations:

In a collision, always saving of momentum. According to the principle of momentum conservation, if no external force is applied on any particles, then the total momentum of this body remains constant i . e the momentum before and after collision is equal.