Newton's Laws of Motion
- Provide the foundation for all the root of physics
- There are 3 fundamental laws of motion
Newton's first law:
- Also called the law of Inertia
- "A body at rest will stay at rest. If in motion will remain in motion unless acted upon by an unbalanced external force."
- In space where there is no friction, a body will continue to move indefinitely if it is already in motion.
Inertia
- The resistance that a body demonstrates to a change in its state of motion.
- All object have inertia.
- The amount of inertia possessed by a body is determined by its mass. (Remember that mass is the amount of matter contained within an object)
Example: If a 150 lbs person run into a 150 lbs person, he could able to stop. If a 300 lbs person run into a 150 lbs person, he could not be able to stop.
- The more mass an object has, the greater its inertia. In other word, the harder it is to move it or slow it down.
Balanced vs Unbalanced forces: If a forces acts on a body, and there is no force to counter it, the force is said to be unbalanced.
- First box - Unbalanced force of 50 Newtons applied to the box
- Second box - The force are balanced. That is, they canceled out.
