* Grams (g) are a unit of mass, which measures the amount of matter in an object.

* Newtons (N) are a unit of force, which measures the push or pull on an object.

Here's why grams are not used for forces:

* Force is a different concept than mass: Force is what causes a change in an object's motion, while mass is a fundamental property of the object.

* Units are specific: Using the wrong unit for a measurement can lead to incorrect results and potentially dangerous situations.

Machines often display forces in Newtons (N) or other force units such as pounds (lbs) or kilograms-force (kgf).

It's important to understand the distinction between mass and force and use the appropriate units for each.