1. Inertia

2.  Every object continues in a state of rest, or of motion in a straight line at constant speed, unless it is compelled to change that state by forces exerted upon it.  Or… An object in motion tends to stay in motion, and an object at rest tends to stay at rest.

3.  Using the first law of motion, describe why a person will hit their head on the windshield if they are not restrained with a seatbelt during a head-on collision.

4.  Using the first law of motion, describe whiplash.

5.  Place a piece paper below a filled water bottle.  Your task is to remove the piece of paper without touching the water bottle.

6.  Open the cap of the water and place an index card on top of the bottle.  Place a skittle on top of the index card.  Challenge: get the skittle into the water.

7.  Watch the following video and describe what is happening based on the first law of motion.  http://www.youtube.com/watch?v=cuG8sIiV8 iQ http://www.youtube.com/watch?v=cuG8sIiV8 iQ

8.  Observe a cart rolling along the floor.  After we push it, why does it continue to roll?  What force is keeping it going??  NO FORCE keeps it going.

9.  Imagine you are in the back of your friend’s car with 2 other buddies and you are in the center. As the car turns to the right, which buddy will you squish?  What is causing this to happen? (Describe using Newton’s 1 st Law)

10.  Galileo knew Newton’s First Law well before Newton…  However, Galileo was concerned with how things moved, not why they moved.

11.  Let’s look at the following picture and situation… (pg. 45 of textbook)

12.  Mass is the measure of inertia.  Mass is NOT volume  Consider a fluffy pillow vs. a shot put.  Mass is not weight  Consider the following demonstration…  http://www.youtube.com/watch?v=aCqQzrPC cFM http://www.youtube.com/watch?v=aCqQzrPC cFM

13.  Metric units are kilograms  1 kilogram is approximately the weight of a baseball bat or a medium sized pumpkin, or a high school discus.  English units are slugs.

14.  Weight = mass * acceleration due to gravity  Acceleration due to gravity = 9.8 m/s/s on Earth.  Units for weight…  Metric units are Newtons  English Units are Pounds

15.  An object that is motionless DOES NOT MEAN that there are no forces acting on the object.  If an object is motionless or at a constant linear speed, it is said to be at EQUILIBRIUM.  There is no net force on the object

16.  A book on a table  A person standing on the ground  Normal force explained Normal force explained  A traffic light hanging from wires in the middle of an intersection.