Newton's First Law of Motion

This section introduces Newton's First Law of Motion - If the net force acting on an object is zero, then the velocity of the object is constant.

Newton's First Law of Motion - If the net force acting on an object is zero, then the velocity of the object is constant.

Newton's first law of motion can also be stated as: An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

If a running car lost control on a curved road, it will continue to run in straight line until an external object like a tree to apply an unbalanced force on it.

Newton's First Law of Motion (Korea Times)
Newton's First Law of Motion

Newton's first law of motion is also called the "Law of Inertia", which can be stated as: Every object has a property called "inertia" that gives the object a tendency to keep its current state of motion.

Last update: 2014.

Table of Contents

 About This Book

 Introduction of Space

 Introducion of Frame of Reference

 Introducion of Time

 Introduction of Speed

Newton's Laws of Motion

 Who Is Newton?

Newton's First Law of Motion

 Newton's Second Law of Motion

 Falling Ball in Earth Frame of Reference

 Falling Ball in Elevator Frame of Reference

 Newton's Third Law of Motion

 Introduction of Special Relativity

 Time Dilation in Special Relativity

 Length Contraction in Special Relativity

 The Relativity of Simultaneity

 Introduction of Spacetime

 Minkowski Spacetime and Diagrams

 References

 PDF Printing Version