Law of Conservation of Momentum states that total linear momentum of system remains constant if:
Correct answer: D. Sum of external forces are applied to a system is zero
- A. Balanced external forces are applied to a system
- B. No external force is applied to a system
- C. Only linear force is applied in a system is zero
- D. Sum of external forces are applied to a system is zero
Explanation
As per the law of conservation of momentum. The total linear momentum of an isolated system remains constant. So, the sum of all external forces must be zero.
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Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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