1. Newton’s Laws of Motion
Unit 4

2. Vocabulary Foldable (8 section)
Obtain Paper
Fold into 4 sections
Fold sides inwards, so can open flaps
Cut on lines for each side, 4 flaps/side
Write: Inertia, Mass, Force, Weight, Equilibrium, Friction, Net Force & Normal Force on flaps
On back, write Newton’s Laws, 1, 2, & 3 & your name on bottom

3. Newton: Isaac not Fig Mathematician & Physicist in 1700’s
Came up with 3 basic ideas that applied to physics of most motion
These ideas became Newton’s “Laws” of motion because they have been tested & proved many, many times over the years.

4. Newton's 1st Law & Football

5. 1st Law
An object at rest remains at rest, and an object in motion remains in motion with the same velocity (speed & direction) unless acted on by an unbalanced force.

6. What does this mean?
If you, or an object, do nothing & nothing happens to you, you will never go anywhere.
If you, or an object are moving at a specific velocity, that’s speed in a specific direction, & nothing happens to you, or the object, you will continue going in that direction at the speed, FOREVER.
You, or an object do NOT change movement unless an unbalanced force is applied to you.

7. Example
Non-movement
Golf ball is on tee, will not move until unbalanced force is applied.
Movement
Golf ball hit by golf club (unbalanced force), golf ball moves.
The golf ball on Earth will eventually stop moving because of gravity, an external, unbalanced force.

8. At your table, state Newton’s 1st law in your own words & come up with at LEAST 3 examples

9. Inertia Newton’s 1st law is also known as the “Law of Inertia”.
Inertia means a tendency to do nothing or to remain unchanged
Inertia...examples

10. Your turn
You have some items at your table, try one or two of the “tricks” to see it you can demonstrate inertia

11. Inertia on Earth
Items do Not continue moving on Earth because there are unbalanced forces:
Gravity
Friction
Air resistance (friction due to air)

12. Inertia vs. Mass

13. Three Collisions in One Accident
As a group at your table read the article “Three Collisions in One Accident”
As a group, discuss and answer the questions on the worksheet.
Turn in the worksheet into your class periods box when completed.

14. Inertia in “Action”