Momentum Calculator

Calculate the momentum from mass and velocity, with different units. The momentum tells, with which vehemence an object moves. If this object hits another one, a part of the momentum is passed, a part is kept. The total size of the momentum doesn't change (conservation of momentum). The unit for the momentum is newton-second Ns, this is calculated as kilograms times meters per second, Ns=kg*m/s.
Please fill in two of the three values ​​and select the appropriate units to calculate the remaining value in the desired unit. Available units are the metric units as well as pounds for the mass and miles per hour for the velocity.

Example: a bicyclist, who together with his bicycle has a mass of 90 kilograms and is speeding downhill with 50 kilometers an hour, has a momentum of 1,25 kilonewton-seconds (kNs). In comparison, a 1.8 ton car traveling at the same speed of 25 kNs has twenty times the momentum because it has twenty times the mass.

Just like mass and energy, momentum is also conserved. This is described by the principle of conservation of momentum, which results from Newton's second and third laws. Newton's second law states that a change in motion is proportional to the force causing it and in the same direction as it. The third law is the famous actio equals reactio, according to which, when two bodies interact, every action is met with an equally strong reaction. From both it follows that momentum can be passed on to other objects, but its overall strength is maintained in the system.
Conservation of energy and conservation of mass are limited in that energy and mass can be converted into one another. However, momentum can only be converted into one or more momentums, or flow into another momentum.
For the momentum transmission, see the momentum conservation calculator.