Newton-second

The newton-second is the SI derived unit of impulse and momentum, equal to the change in momentum caused by a one-newton force acting for one second.

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Impulse: Impulse is the time integral of force and equals an object's change in momentum. The newton-second is the SI unit used to quantify impulse.
Newton: The newton is the SI derived unit of force, equal to one kilogram metre per second squared. Multiplying this force unit by a second gives one newton-second.
Impulse-momentum theorem: The impulse-momentum theorem states that net impulse equals an object's change in momentum. It lets impact forces be related to momentum changes measured in newton-seconds.
Joule: The joule is the SI derived unit of energy and work. It measures energy, unlike the newton-second's impulse or momentum.
Momentum: Momentum is the product of an object's mass and velocity. A newton-second expresses momentum and changes in momentum in SI units.
Second: The second is the SI base unit of time. It supplies the duration factor in the newton-second.
Rocket propulsion: Rocket propulsion generates thrust by expelling propellant and gaining momentum in the opposite direction. Engine impulse and thrust over time can be expressed in newton-seconds.
Kilogram metre per second: The kilogram metre per second is the SI base-unit expression for momentum. It is dimensionally equivalent to the newton-second.
Newton's second law: Newton's second law states that net force equals the rate of change of momentum. Integrating this law over time yields impulse in newton-seconds.
SI derived unit: An SI derived unit is formed from SI base units through multiplication or division. The newton-second combines the newton and second in this way.