What is the SI unit for momentum?

The SI unit for momentum is expressed as the product of mass and velocity. Momentum is defined mathematically as the product of an object's mass (in kilograms, kg) and its velocity (in meters per second, m/s). Therefore, when we combine these units, we get kilogram meters per second, denoted as kg·m/s. This unit represents the quantity of motion an object has, which depends on both its mass and how fast it is moving.

Option B accurately reflects this relationship, making it the correct choice. The dot (·) in the notation kg·m/s indicates multiplication, reinforcing that momentum is derived from mass multiplied by velocity.