The newton second (also newton-second, symbol N s or N·s) is the derived SI unit of impulse. 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.
It can be used to identify the resultant velocity of a mass if a force accelerates the mass for a specific time interval.
Momentum is given by the formula:
This table gives the magnitudes of some momenta for various masses and speeds.
|0.42||2.4||1||A 420 gram football (FIFA specified weight for outdoor size 5) kicked to a speed of 8.6 km/h.|
|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 137 km/h, making it one of the hardest kicks measured.|
|1,500||16.7||25,050||A regular small car weighing 1.5 tons crashing at 60 km/h|
|2,600||16.7||43,420||An SUV weighing 2.6 tons crashing at 60 km/h|
|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.|
|2,030,000||8050||1.63x1010||Space Shuttle launched from earth to orbit|
|45,702||10834||4.95x108||Apollo 11 launched from earth to orbit|
|0.0075||350||2.6||9x19 mm 7.5 gram pistol round launched at 350 m/s|
|0.004||945||3.8||5.56 mm (.223) 4 gram rifle round launched at 945 m/s|
|0.05||860||43||12.7x99 mm (.50 BMG) 50 gram rifle round launched at 860 m/s|
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