Newton's Laws of Motion

In 1686, a man named Sir Isaac Newton came up with laws that describe the relationships between force and motion.

Newton's Law #1

An object at rest will remain at rest and an object in motion will remain in motion unless a force acts on it. Example: A rock will not move unless a force acts on it.

Example 2: Astronauts float forever in space until a force acts on them.

Inertia

Inertia is the resistance to a change in motion.

Larger objects have more inertia.

Newton's Law # 2

Acceleration of an object increases as the amount of force causing the acceleration increases.

In other words, force must increase for speed to increase.

This can also be expressed with the formula:

Force = Mass x Acceleration

F = MA

Example: It takes more force for a large object to travel as fast or far as a small object.

Example: With the same force, a small object will travel farther than a large object.

Newton's Law #3

For every action there is an equal and opposite reaction.

Example: If you let the air out of a balloon the air goes backwards while the balloon goes forward.

Questions

Who discovered 3 Laws of Motion?

What is Newton's 1st Law? Example?

What is Newton's 2nd Law? Example?

What is Newton's 3rd Law? Example?