Newton-second

Template:Short description Template:Infobox unit The newton-second (also newton second; symbol: N⋅s or N s)^[1] is the unit of impulse in the International System of Units (SI). It is dimensionally equivalent to the momentum unit kilogram-metre per second (kg⋅m/s). One newton-second corresponds to a one-newton force applied for one second.

\vec{F} \cdot t = Δ m \vec{v}

It can be used to identify the resultant velocity of a mass if a force accelerates the mass for a specific time interval.

Definition

Momentum is given by the formula:

𝐩 = m 𝐯,

$𝐩$ is the momentum in newton-seconds (N⋅s) or "kilogram-metres per second" (kg⋅m/s)
$m$ is the mass in kilograms (kg)
$𝐯$ is the velocity in metres per second (m/s)

This table gives the magnitudes of some momenta for various masses and speeds.

Mass (kg)	Speed (m/s)	Momentum (N⋅s)	Explanation
0.42	2.4	1	A Template:Convert football (FIFA specified weight for outdoor size 5) kicked to a speed of Template:Cvt.
0.42	38	16	The momentum of the famous football kick of the Brazilian player Roberto Carlos in the match against France in 1997. The football had a speed of Template:Cvt, making it one of the hardest kicks measured.
Template:Val	10	Template:Val	A four-door car weighing Template:Cvt crashing at Template:Cvt.
Template:Val	10	Template:Val	A mid-size SUV weighing Template:Cvt crashing at Template:Cvt.
6	1	6	The total impulse of a class C model rocket engine, which can be found in amateur fireworks.
10	2	20	The total impulse of a class D model rocket engine, which also can be found in amateur fireworks.
Template:Val	Template:Val	Template:Val	Space Shuttle launched from Earth to orbitTemplate:Efn
Template:Val	Template:Val	Template:Val	Apollo 11 launched from Earth to orbit
0.0075	350	2.6	A Template:Convert handgun bullet (e.g. 9mm Parabellum) fired at Template:Cvt.
0.004	945	3.8	A Template:Convert rifle bullet (e.g. 5.56×45mm NATO) fired at Template:Cvt.
0.05	860	43	A Template:Convert anti-material bullet (e.g. .50 BMG) fired at Template:Cvt.