Newton's first law is often called the law of inertia
as we know from experience, some objects have more inertiathan others. it is obviously more difficult to change the motion of large boulder than that of a basketball, for example. the inertia of an object is measured by its mass
Newton's first law of motion is also known as law of anertia.
The other name for Newton's first law of motion is law of inertia ...
The other name of Newton's first law of motion is law of inertia