Before getting into force, it's best to start with an understanding of momentum.

By definition, linear momentum is the mass of an object, times the velocity of that object.

**linear momentum = mass x velocity**

Mass is a quantity, meaning it doesn't have a direction. But velocity does have a direction and magnitude, which makes it a vector.

That means linear momentum shares those qualities and is also a vector.

#### Summary

**All that jargon just tells us that momentum will always go the in the same path of the velocity.**

### Force

According to Newton's second law of motion, when a force acts on an object, that force is equivalent to the rate of linear momentum change of that object.

Mathematically, the net force is equal to a weight constant, multiplied by the momentum change, divided by time.

**force = mass x velocity / time**

This relates to the behavior of objects when they are subjected to force. It explains that the way an object accelerates is dependant on two main factors.

These features are:

- the mass of the object and
- the net force applied to the object.

Now, let's dive a little deeper.

#### Acceleration

The acceleration of an object inversely depends on its mass.

So the __more__ mass, the __less__ the acceleration. The acceleration also depends directly on the net force being applied.

That can sound a bit confusing.

#### Summary

**When the mass of an object increases, it's acceleration decreases. But when you apply more force to an object, the acceleration of that object increases.**

**So what's the Newton Meter really measuring? **

A Newton meter measures the amount of force required to accelerate one kilogram of mass, at a rate of 1 meter per second squared.

For more articles about understanding and calculating terms related to science, check out our full list of **physics** calculators.