Basic:
Newton's 1st law: also known as Law of inertia
- Statement: 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 a unbalanced force.
- Explanation: All object resist changing in their state of motion, they tend to "keep doing what they are doing".
- Diagram: See diagram below:
Inertia:
Galileo's experiment about Inertia
- Galileo had an experiment about ball and plane that balls roll down of an plane would roll up to the opposite plane to attain the approximately original height, no matter the if the inclines of two planes were the same.
- He postulated that if there was no friction, the ball would roll up to the opposite plane at the exact same height (see the picture below).
- Galileo continued postulating: if the opposite incline were elevated at nearly a 0-degree angle, then the ball would roll almost forever in an effort to reach the original height (see the picture demonstrating below)
All pictures not cited are taken by Camela Ye or from Weebly Picture Searching.
- Conclusion about inertia