Horses live in nearly every part of the world. They live in the  United States, Europe, Germany, Canada, and many other countries.
Impulse & Momentum. Summary. 1  is a quantity that describes an object's resistance to stopping (a kind of moving inertia). 2  is represented by the symbol p (boldface). 3  is the product of an object's mass and velocity.  is a vector quantity (since velocity is a vector and mass is a scalar).
This entry contributed by Leonardo Motta. Conservation of momentum is a fundamental law of physics which states that the momentum of a system is constant if there are no external forces acting on the system. It is embodied in Newton's first law (the law of inertia). Suppose we have two interacting particles 1 and 2, possibly of different masses.