The SI unit of linear momentum is
Correct answer: B. kg m s-1
- A. N s-1
- B. kg m s-1
- C. kg m s-2
- D. N m
Explanation
Momentum is mass times velocity, so its unit is kilogram metre per second. It is also equal to the newton second, since a newton is kg m s-2 and multiplying by a second gives kg m s-1. The unit kg m s-2 is the newton, a force, and the newton metre is the joule.
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About Linear Momentum
Linear momentum is the vector product of mass and velocity, p = mv, and changes when a net external force acts. Work includes impulse as the change in momentum, conservation of momentum in isolated systems, collisions and explosions, and the distinction between elastic, inelastic and perfectly inelastic collisions.
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