Newton's First Law

Newton's First Law or Newton's First Law of Motion is the first of Newton's Three laws of motion invented by Sir Isaac Newton, one of the greatest mathematician, physicist, and astronomer. Newton's First Law is sometimes known as the Law of Inertia.

What is Newton's First Law of Motion?

Newton's First Law of Motion states 2 things.

First part of Newton's First Law of Motion

The first of Newton's First Law of Motion states that sunless acted on by an outside force, an object at rest, stays at rest.

Second part of Newton's First Law of Motion

The second part of  Newton's First Law of Motion states that unless acted on by an outside force, an object moving with uniform velocity continues to move at that velocity. So, in the above picture, the golden ball moves at the velocity of 5 m/s so unless there is an outside force acting on it, it will continue to move at 5 m/s. In reality, though, a ball moving at a velocity will eventually come to a stop because it is acted on by many forces such as air resistance.