Final answer:
Momentum is directly proportional to both mass and velocity and is represented as a vector. The SI unit for momentum is kg. m/s.
Step-by-step explanation:
The example of momentum p is the product of the mass m and the velocity v of an object; that is, p=mv, is an example of a directly proportional relationship. When we look at the equation, momentum is directly proportional to the object's mass and velocity.
Therefore, the greater an object's mass or the greater its velocity, the greater its momentum. Additionally, momentum is a vector, meaning it has both magnitude and direction, with the direction being the same as that of the velocity v. The SI unit for momentum is kg. m/s, highlighting its composition as a product of mass and velocity.