Momentum
Momentum explained in an easy to understand way:
Imagine trying to push a heavy shopping cart that's already rolling quickly down a supermarket aisle. Just like the difficulty in stopping or changing the direction of that cart depends on how heavy it is and how fast it's moving, an object's momentum is determined by its mass and velocity. In this analogy, the shopping cart represents the object, its weight is the mass, and its speed down the aisle is the velocity; together, these factors make it harder to stop, just as mass and velocity combine to create momentum.
Practice Version
Momentum: The product of an object's mass and velocity. Momentum. Momentum is how much motion something has and how hard it is to stop it.