Some examples of momentum are a truck moving towards the east at a given velocity and a basketball with a mass traveling through the air in a southerly direction. The momentum of an object is a vector quantity that is given by the formula mass multiplied by the velocity, or p= m x v.
In physics, the letter "p" represents momentum. From the formula, it is simple to see that a change in either the velocity or mass of an object will affect its momentum. Similarly, when comparing two objects, such as a big truck and a small car that are traveling at the same velocity and same direction, the truck will have a greater momentum because its mass is greater. However, if the truck were at rest or the velocity is equal to zero, then its momentum would be zero.