Section+5.2+-+Conservation+of+Momentum+in+1D


 * if the net force acting on a system of interacting objects is zero, then the linear momentum of the system before the interaction equals the linear momentum of the system after the interaction


 * Ex) as you throw a ball forward on ice, you move backward and thus creating a net force of zero (remember Newton's 3rd Law: action-reaction)

Equations

where m1 and m2 are the masses of two different objects, v1 and v2 are the velocities of two different objects
 * p_total,initial =m1v1 +m2v2

the change in momentum is equal in magnitude but opposite in direction
 * m1v1= -m2v2