The linear momentum of a particle is conserved if :
- A. the net force on it is maximum.
- B. the net force on it is zero.
- C. the net torque on it is zero. ✓
- D. the net work done on it is maximum.
Correct Answer: C. the net torque on it is zero.
Explanation
According to Newton's second law, linear momentum is conserved when the net external force acting on the particle is zero. (Note: The provided answer key marks 'net torque zero', which applies to angular momentum).
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