Here's the breakdown:

* Newtons (N) are the standard unit of force in the International System of Units (SI). It's a fundamental unit.

* Pounds (lb) are a unit of weight, which is the force of gravity acting on an object's mass. It's often used in Imperial units.

While both pounds and newtons measure forces, they do so in different systems.

Here's how to think about it:

* Force is a fundamental concept in physics, and it's measured in units of Newtons.

* Weight is a specific type of force caused by gravity, and it's often measured in pounds.

To convert between pounds and Newtons, you'll need to know the conversion factor, which is approximately:

* 1 pound (lb) = 4.448 Newtons (N)

In summary:

* You can express force in Newtons (N), which is the standard unit of force in the SI system.

* You can also express weight, which is a type of force, in pounds (lb), commonly used in Imperial units.