1. Sci Warm-Up: Reading Trivia
Sci Warm-Up: Reading Trivia! Answer the following 3 questions with your team and win a fabulous prize! Use your reading to help you find the answers…
What are Newton’s 3 Laws of Motion?
If you drop a hammer and a feather on the moon, which will land first?
Why do astronauts float in space?
WRITE YOUR ANSWERS ON A PIECE OF PAPER!

2. Newton’s 3 Laws of Motion
Thought Experiments…

3. Newton’s 1st Law, Part I
Part I: When the forces acting upon an object are balanced, meaning the net force is zero, objects at rest (not moving) stay at rest.

4. Newton’s 1st Law, Part II
Part II: When the forces acting upon an object in motion are balanced (the net force is zero), the object will continue moving in a straight line at a constant speed.

5. Newton’s 1st Law is also known as the “Law of Inertia”.
Inertia = the tendency of an object to resist any change in its motion.

6. Galileo’s Thought Experiment:

7. Newton’s 1st Law Thought Experiment #1
Reflect Q:
In Galileo’s experiment, the ball did not roll up any of the second ramps all the way to the height from which it was released on the first ramp. Why not?
What do you think would happen if Galileo’s experiment was repeated using frictionless ramps?
Use what happens to the toy truck on the lab cart to describe what happens to a passenger when a car speeds up or stops suddenly.

8. Newton’s 1st Law
Thought Experiment #2

9. Newton’s 2nd Law of Motion
If an object experiences unbalanced forces, (a “net” force), it will change velocity, (accelerate).
The acceleration (a) of an object varies directly with the net force (F) acting on it and varies inversely to it’s mass (m).
acceleration = Force
mass

10. Newton’s 2nd Law of Motion
In other words….
F = m*a

11. Newton’s 2nd Law of Motion Thought Experiment #1
To accelerate 625mph2 (from 5 to 80 mph in 7.2 minutes):
F = 625*2559; F = 1,599,375N
625 = 625*825; F = 515,625N

12. Newton’s 2nd Law of Motion Thought Experiment #2
Find and describe a scene from a cartoon or movie showing motion that breaks either the first or second law of motion, providing evidence that the scene could never really happen.
Sketch two examples of where you see Newton’s second law of motion at work in the world. Sketch the two examples and write a description of each on the worksheet.

13. Newton’s 3rd Law
When two objects interact, each object experiences a force from the other object. The forces in this pair are equal in size and opposite in direction.

15. Newton’s 3rd Law Thought Experiment #1

16. Newton’s 3rd Law Thought Experiment #2
How are the examples with the ice skater similar to what happens to your propeller car and the air behind it when the propeller is turning?
Think of two examples of Newton’s third law of motion. Sketch the examples on the worksheet and record a description of each.