• ### Center of Mass

The point at which a given net force acting on the system will produce the same acceleration as if all the mass were concentrated at that point.

• ### Impulse

A force applied over a period of time. See definition of impulse.

• ### Momentum

The product of an object's mass and velocity. See definition of momentum.

• ### Conservation of Momentum

The principle stating that for any system with no external forces acting on it, momentum will be conserved.

• ### Formulae

 Position of the center of mass of a system of particles xcm =  mnxn

 Velocity of the center of mass of a system of particles vcm =  mnvn

 Acceleration of the center of mass of a system of particles acm =  mnan

 Acceleration of the center of mass of a system of particles given an external force Fext = Macm

 Definition of Impulse J = FΔt

 Change in velocity caused by an impulse J = mvf - mvo

 Definition of momentum p = mv

 Relation between force and momentum = F

 Impulse-Momentum Theorem J = Δp

 Definition of the linear momentum of a system of particles P = Mvcm