Momentum is a measure of an object's mass in motion. It's calculated by multiplying the object's mass by its velocity.

Here's the formula:

Momentum (p) = Mass (m) * Velocity (v)

Where:

* p is momentum, typically measured in kilogram meters per second (kg⋅m/s)

* m is mass, typically measured in kilograms (kg)

* v is velocity, which is the speed and direction of an object, typically measured in meters per second (m/s)

Example:

Let's say a car has a mass of 1000 kg and is traveling at a speed of 20 m/s. To find its momentum, we would use the formula:

* p = m * v

* p = 1000 kg * 20 m/s

* p = 20,000 kg⋅m/s

Therefore, the car's momentum is 20,000 kg⋅m/s.

Important Note: Velocity is a vector quantity, meaning it has both magnitude (speed) and direction. Therefore, momentum is also a vector quantity and has both magnitude and direction.