What is momentum defined as?

Momentum is defined as the product of an object's mass and its velocity. This definition captures the essential concept that momentum reflects how much motion an object has. The mass indicates how much matter is present in the object, while velocity describes how fast the object is moving in a specific direction.

Momentum is a vector quantity, meaning it has both magnitude and direction. The greater the mass or velocity of an object, the greater its momentum. This relationship is fundamental in physics, particularly in the context of collisions and conservation laws, where the total momentum before and after an interaction remains constant in an isolated system.

The other choices presented do not accurately describe momentum. Weight and speed do not directly correlate to the concept of momentum; instead, momentum is specifically linked to mass and velocity. Similarly, while energy is related to motion, it's not the same as momentum, and the total energy of an object includes various forms such as kinetic and potential energy. Lastly, the net force acting on an object is a separate concept associated with acceleration, not momentum, thereby underlining the unique relationship between mass, velocity, and momentum.