Before we embark on discussing how to calculate momentum, let us define it. Momentum can be defined as the quantity of motion of a moving body or simply the product of mass and velocity of an object. Its SI unit is kilograms meters per second (Kg.m/s).

### Formula to Calculate Momentum.

Mass can be defined as the amount of matter present in a body and its SI unit is kilogram (Kg).

Simply, we can define velocity as the speed of an object in a particular direction. SI unit of velocity is meters per second (m/s).

**Example 1:**

A physics student throws a stone with a mass of 0.1Kg against a brick wall with a velocity of 20m/s. Calculate the momentum of the stone.

Therefore, the momentum of the stone is 2 Kg.m/s.

**Example 2:**

Calculate the momentum of a 163 grams baseball moving in the positive direction with a speed of 42m/s.

We begin by converting the mass from grams to kilograms. We do this by divide the grams by 1000.

**= 163 รท 1000**

**= 0.163 Kg.**

**Momentum = Mass x Velocity**

**= 0.163 x 42**

**Hence, the momentum of the ball is 6.846** **Kg.m/s.**

**Example 3:**

Find the momentum of a person jogging at the speed of 3m/s and weighs 70 Kg.

**Momentum = Mass x Velocity**

**= 70 x 3**

**Therefore, the momentum of the person is 210 Kg.m/s.**