Here's why:
* Momentum is a measure of an object's mass in motion. It's calculated by multiplying an object's mass (in kilograms) by its velocity (in meters per second).
* The greater the momentum of an object, the harder it is to stop. This is because a more massive object or an object moving faster will have a larger momentum, requiring more force to bring it to rest.
While momentum itself doesn't have a specific unit like kilograms or meters, it's typically expressed in kilogram-meters per second (kg m/s).