NEWTON'S LAW

The Three Laws of Motion by Sir Isaac Newton explain all aspects of motion.

1.Newton's First Law describes motion produced by balanced forces.
- An object at rest will remain at rest, and a moving object will remain at a constant velocity unless unbalanced forces act on it.
- Newton was first to use the term inertia to describe the tendency of objects to remain in motion or stay at rest. Inertia comes from the Latin word iners, which means "lazy".


2. Newton's Second Law describes motion produced by unbalanced forces.
- This law is best stated using the equation:
Force = mass X acceleration
- Acceleration is always in the direction of the unbalanced force.
- The units of force are "Newtons".
1 N = 1 kg X 1 m/s/s

3. Newton's Third Law explains why forces act in pairs.
- For every action, there is an equal and opposite reaction.
- Forces always act in pairs.

(resource from: http://www.middleschoolscience.com/)